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january 2021
03

Mathematics Questions and Answers January 03, 2021

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Wind Mountain is an archaeological study area located in southwestern New Mexico. Potsherds are broken pieces of prehistoric Native American clay vessels. One type of painted ceramic vessel is called Mimbres classic black-on-white. At three different sites the number of such sherds was counted in local dwelling excavations. Site I Site II Site III

3. Astudent wants to study the association between mode of instruction: in-person vs. online and completion of course: passed or failed in English classes. The student collected a sample of 210 students, 104 in-person and 106 online to analyze the relationship. e T e a. Determine the explanatory and response variable in this relationship

Consider each distribution. Determine if it is a valid probability distribution or not, and explain your answer. (a) X 0 1 2 P(x ) 0.23 0.60 0.17 O No. The probabilities sum to 1. O No. The probabilities do not sum to 1. Yes. The probabilities sum to 1, Yes. The probabilities do not sum to 1. ( b ) X 0 1 2 P(x ) 0.23 0.60 0.27 Yes. The

Weight of gravel in a pile is 120 lb. Is the value from a discrete or continuous data set? its O The data set is neither continuous nor discrete. O A continuous data set because there are infinitely many possible values and those values can be counted. O A continuous data set because there are infinitely many possible values and those values can

(5 points) Problem #12. Consider testing the hypotheses Ho: p = 0.4 versus Ha: p > 0.4. Four possible sample statistics, along with four possible p-values, are given. Match the sample statistics to their p-values. For each sample, there were at least 5 "successes" and at least 5 "failures". A p=0.42 B p=0.38 C p=0.51 D p=0.46 (a) p-value = 0.72

Full solutions will give good feedback promise t-Test: Two-Sample Assuming Equal Variances Male Female Mean 2.19 1.48 Variance 2.93 1.91 Observations 28 30 Pooled Variance 2.40 Hypothesized Mean Difference 0 df . V t Stat P(T> =t) one-tail t Critical one-tail P(T>=t) two-tail 0.086 t Critical two-tail 2.003A large car insurance company is

Need help in the following Say if you intend to fit a multiple linear regression using the states data. Running the command: fit |t/) (Intercept) 937. 879834 28.029133 33.461

Asurvey was conducted that asked 100? people how many books they had read in the past year. Results indicated than1:: 11.3 books and s = 16.6 books. Co nstruct a 90% condence interval for the mean number of books people read. Interpret the interval. a Click the icon to View the table of critical tvalues. Construct a 90% condence interval for the

QUESTION 18 Eggs that are contaminated with salmonella can cause food poisoning among consumers. A large egg producer takes a simple random sample of 200 eggs from all the eggs shipped in one day. The laboratory reports that 11 of these eggs had salmonella contamination. Unknown to the producer, 0.2% of all eggs shipped had salmonella. In this

() Display the data in a scatter plot Choose the correct grigh below OA OC a a Q E (b) Calculate the sample correlation conficient t. (Round to three decimal places as needs (c) Describe the type of correlation, if any, and interpret the correlation in the contend of the data There is station Interpret the correlation, Choose the correct answer

The heights of UNC sophomores are approximately normally distributed. The heights in inches of 8 randomly selected sophomores are shown below. Use these heights to find a 95% confidence interval for the average height u of UNC sophomores. Give the endpoints of your interval to one decimal place. 72, 69, 70, 68, 70, 67, 64, 67 a) Use these heights

Question 1 Suppose you use simple random sampling to select and measure 46 backpacks' weights, and find they have a mean weight of 71 ounces. Assume the population standard deviation is 7.2 ounces. Based on this, construct a 90% confidence interval for the true population mean backpack weight. Give your answers as decimals, to two places ounces

Exercise 6 EXERCISE # 6 DO YOU KNOW THE BASICS? Test your understanding of Chapter 6 by answering the following questions: 1. Why is the expected value of a random variable defined by the expression Cai f(a;)? 2. Why is the graph of a density function for a discrete random variable like a frequency diagram? 3. Suppose X is a random variable

11. [-11 Points] DETAILS WEBASSIGNCALCETZ 3.1.003C. Find the linearization of f(x) = tan'1 x at X = 1. L(x) = Use ii: to approximate tan1(0.9). (Round your answer to three decimal places.) MY NOTES ASK YOUR TEACHER 12. [-/1 Points] DETAILS WEBASSIGNCALCETZ 3.1.003A. 3 Find the linearization of f(x) = \\/x at x = 0. L(x) = Submit Answer Use it to

A company that develops over-the-counter medicines is working on a new product that is meant to shorten the length of sore throats. To test their product for effectiveness, they take a random sample of 110 people and record how long it took for their symptoms to completely disappear. The results are in the table below. The company knows that on

Your company is in the process of comparing the sales of their two main products (denoted by A and B). More specifically, they would like to test if the average sales of product A is more than that of product B. The historical data is given in the file "salesdata.txt" where A represents the sales of product A (in $10,000) and B represents the

The following plots are from a simple linear regression model. Residual Plots for y Normal Probability Plot Versus Fits 28 8 9 9 Residual Percent 2 Residual Fitted Value Histogram Versus Order Residual Frequency 10 20 30 40 50 60 70 80 20 100 Residual Observation Order Discuss whether the normal population assumption holds, including the outlier

\\ l \\ A I L A 6. Aboredstatisticianbelievestheaveragelength(pg)ofcommercialbreakson cable channels (ESPN, TNT, etc.) is longer than the average length (MN) of commercial breaks on the networks. He times a random sample of commercials from each of the two types of broadcasts. (Assume the lengths of commercial breaks from both types of broadcasts

26. A tutor collected data about the number of absences her students had: 3 7 8 9 Determine the mean, standard deviation and variance for this data by hand showing all of your work. Keep 2 d.p. when necessary. { 5 marks - I } 27. The scores on a test worth 40 marks are shown: 17, 20, 21, 23, 23, 24, 25, 26, 29, 30, 30, 31, 31, 33, 34, 34, 36, 37,

The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cities. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates are no outliers. Complete parts (a) through (c) below. 68.09 79.99 70.42 83.11 79.33 85.94 101.02 97.39

Consider the following time series data for Sales. Period Sales 1 1360 2 1310 3 1290 4 1350 5 1290 6 1120 7 1190 8 1230 9 1080 10 1120 11 1060 12 940 13 920 14 768 15 670 16 650 17 679 18 678 19 450 20 200 Copy Data Step 1 of 3: What is the R 2 for a Linear forecasting model? Use four decimal places. Step 2 of 3: What is the R 2 for a Polynomial

i need explanation more The scores of a random sample of 8 students on a physics test are as follows: 60, 62, 67, 69, 70, 72, 75, and 78. a. Test to see if the sample mean is significantly different from 65 at the .05 level. Report the t and p values. b. The researcher realizes that she accidentally recorded the score that should have been 76 as

For the statement below, write the claim as a mathematical statement. State the null and alternative hypotheses and identify which represents the claim. A laptop manufacturer claims that the mean life of the battery for a certain model of laptop is more than 3 hours. Write the claim as a mathematical statement. OA. H23 OB. u#3 O C. H> OD. US3 O E.

#2) Suppose you are convinced that the log of Intel's quarterly sales is not covariance stationary (it has a unit root) and decide to model it using an ARII) model. You use: In (5.1...) 'in (sacs.-.) = I + 61 [In (Salem) In (shawl + e. Table 3 shows the results of that regression. Table 3 Quarterly Observations, January l985Deocmbcr 1999

A particular product is shipped from a factory to different retailers in the order that orders were received. Store G is in line to receive a shipment behind six other stores. It has been determined that the amount of time in hours it takes for an order to be shipped out of the factory to any one retailer is a random variable following a geometric

Watch the video and then answer the question given below. Click here to watch the video. The flower box is 5 ft long, and its ends are in the shape of a trapezoid. The upper and lower bases of the trapezoid measure 18 in. and 10 in., respectively, and the height is 9 in. Find the volume of the flower box. -18 in. 9 in. - 5 fit 10 in. The volume is

A poll of 1745 U.S. adults found that 17% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Report answers to at least 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to

Question Laura flipped a coin 64 times and obtained 28 heads. To determine if these results suggest that the coin is weighted against heads, she performed the following hypothesis test: Ho : p = 0.5 Ha : p

A. In each of Problems 1 through 10, solve the given equations using exact differential equations. 1. (6x + y? )dx + y(2x - 3y)dy = 0 2. (y2 - 2xy + 6x)dx - (x2 - 2xy + 2)dy = 0, when x = 1,y = 2 3. v(2uv2 - 3)du + (3u2v2 - 3u + 4v)dv = 0, when u = 1, v = 1 4. (1 + yz + xy? ) dx + (x? y + y+ 2xy)dy = 0 5. (w3 + wz2 - z)dw + (23 + w2z - w)dz = 0,

. Question 7 0/2 pts 9 3 99 1 Details The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 80 and the standard deviation was 10. 50 60 70 80 90 100 110 Distribution of Test Scores Q What is the approximate percentage of students who scored

The time spent waiting for a heart transplant for people ages 35-49 in a recent year follows a normal distribution with a mean wait time of 204 days and a standard deviation of 25.7 days 9 1 point The time spent (in days) waiting for a heart transplant for people ages 35-49 in a recent year follows a normal distribution with a mean wait time of

Harvard and MIT will have a friendly hockey match. The number of goals that Harvard is expected to score follows a Poisson distribution with the average 1 = 3 per game. On the other hand, the number of goals that MIT is expected to score follows a Poisson distribution with average 2 = 4 per game. a) What is the probability that MIT wins 2-1? b) If

Can I have help here, I need to find the P-value to reject the null hypothesis using alpha=0.05 Height (whole Foot Size inches) (whole inches) 60 7 60 8 60 62 8 63 9 64 9 65 9 66 10 66 10 66 10 67 10 67 10 68 10 68 11 68 11 69 11 70 11 70 11 70 11 70 12 71 12 72 12 72 12 72 13 74 14 74 14 75 14

11. [4 points] Joey appears to be growing slowly as a toddler, His height between 18 and 30 months of age increases as follows Observed Predicted Age (month) Height (cm) Height Residual 18 76.5 -.06G 21 78 - 7 72.077 24 83. 0 81.580 .412 27 84 . 8 84 . 099 30 86.0 - .61 The least squares regression line (LSRL) fitted to this data has equation

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 40 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that o is known to be $2.00 per 100 pounds. (a) Find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for

Question 2 of 3 A random sample of 721 = 19 securities in Economy A produced mean returns of X 1 = 5.7% with $1 = 2.2% wee another random sample of 722 = 18 securities in Economy B produced mean returns of X 2 = 4.7% with $2 = 2.4%. At O = 0.1, can we infer that the returns differ significantly between the two economies? Assume that the samples

\f16 12 70,5 0.5 1, 1,5 2 2'5 3 3,5 4 4'5 5 5,5 x Scatter diagram #1 V b. What does the scatter diagram indicate about the relationship between the two variables? There appears to be a linear relationship between 3 and y. c. Try to apprOXImate the relationship between a: and y by drawing a straight line through the data. Which of the follomng

Question 68 2 pts Pearson's r assumes linear continuous interval/ratio variables. What would be the correlation coefficient utilized if your variables were discrete and ordinal? (Note: This is an extra credit question. We didn't study this and you didn't have to know it, however, if you reason it through based on what you have learned, you can get

. Question 2 v Assume that a sample is used to estimate a population mean ,u. Find the margin of error M.E. that corresponds to a sample of size 22 with a mean of 27.4 and a standard deviation of 20.5 at a confidence level of 98%. Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. ME. =:] Answer

Suppose that customers can purchase one of three brands of milk at a supermarket. In a study to determine whether one brand is preferred over another, a record is made of a sample of n=300 milk purchases. The data is the following: ms Do the data provide sufcient evidence to indicate a preference for one or more brands

Let's say that we're interested in whether a state being a democracy influences how many wars it's had over the last 100 years. After randomly sampling the population, we get the following. Democracies Wars Non-dems Wars a 4 f 7 b 7 g 9 c 3 h 12 d 4 i 15 e 6 j 20 Based on these data, is there a significant relationship between democracy and wars?

This is part of a multi-part question using the same data: M&M/MARS, makers of M&M Chocolate Candies, conducted a national poll in which more than 1 million people indicated their preference for a new color. The tally of this poll resulted in the replacement of tan-colored M&Ms with a new blue color. In the brochure "Colors," made available by

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Assume that adults have IQ scores that are normally distributed with a mean of 103.5 and a standard deviation of 16.5. Find the probability that a randomly selected adult has an IQ greater than 125.7. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 125.7 is (Round to four decimal places

Hypothesis Test for One Population Proportion In 2015, it was reported that 64% = .640 of adult Americans watched TV news regularly. A sociologist wonders: Is the proportion different today? Do all Steps1-4 and write the Conclusion. Step 1. State the null Hypothesis Ho: p = ? Step 2. State the alternative Hypothesis H1: ? Step 3. Graph, shade, and

An experimental psychologist thought that there was a relationship between people's problem-solving ability and their parents' attitudes toward authority. In addition, the psychologist thought that anxiety might affect problem-solving ability. In this experiment, 12 participants were chosen whose parents were authoritarian and 12 were chosen whose

) A market survey was conducted in four cities to find out the preference for brand 04 A soap. The responses are shown below: Delhi Kolkata Chennai Mumbai Yes 45 55 60 50 No 35 45 35 45 No opinion 5 5 5 5 ( a ) What is the probability that a consumer preferred brand A, given that he was from Chennai? ( b ) Given that a consumer preferred brand A,

The following problem establish some more interesting results related to Newton divided differences: i) Show that f [ x 0 ? , x 1 ? ] = ? 0 1 ? f ? ( ( 1 ? t ) x 0 ? + t x 1 ? ) d t ii) Show that this can be used to justify the expression the expression f [ x , x ] = f ? ( x ) Hint: Start with the integral expression and show that you get the

| An FICT was designed to test the effectiveness of naltrexone. an opiate receptor antagonist, as a treatment for alcohol dependence. Subjects with chronic severe alcohol dependence were randomly assigned to either 3 months of naltrexone treatment or 3 months at placebo treatment. The number at drinks per drinking day was compared between the two

1. Suppose we use sample data to construct a 90% confidence interval for the true difference in population proportions, and the interval supports that there is a difference in the population proportions. If we use the same sample data to construct a 95% confidence interval for the true difference in population proportions, what can we say about

Bryant and colleagues (2005) did not report confidence intervals around their means and did not use confidence intervals to test any hypotheses. Let's pretend that they did. Use the hypothetical situations, below, to answer the following questions. Question 36 of 392 Points You can create a confidence interval around: A. A sample mean B. A

1.Suppose a normally distributed set of data with 5200 observations has a mean of 160 and a standard deviation of 17. Use the 68-95-99.7 Rule to determine the number of observations in the data set expected to be below a value of 211. Round your result to the nearest single observation. H wamap.org (9 55mins x 0 Question 4 v E 10 pts '0 1 G)

Problem # 8. In a small summer course, Professor Blinky wants to compare the number of homeworks completed to final grades as shown in the table below. X (Homeworks Completed) 6 8 4 2 6 Y (Final Grades) 82 93 78 40 70 X Y xy x2 y2 6 82 492 36 6724 8 93 744 64 8649 4 78 312 16 6084 2 40 80 4 1600 6 70 420 36 4900 E 26 363 2048 156 27957 (a) Find

STATISTICS ANOVA, ANCOVA, REGRESSION, RSTUDIO Directions: Answer the following questions inside the picture and choose the correct answer. Explain why it is the correct answer. All the details for the question is indicated in the picture for each number. 1. In normality test, it is possible to use a significant test comparing the sample

An exal d on in biology has been taken by biology majors and also by some students from other majors. It is widely believed that the scores for both groups Espan are normally distributed. A random sample of 29 examinations completed by biology majors and an independent random sample of 24 examinations completed by students from other majors are

Jeff Richardson, el encargado de recepcin de un distribuidor de productos qumicos, se enfrenta con el problema continuo de recibir tubos de ensaye, platos Petri y matraces rotos. Jeff determin algunas precauciones adicionales de empaque que se pueden tomar para prevenir la rotura de las piezas y ha pedido al director de adquisiciones que informe a

Students were given different drug treatments before revising for their exams. Some were given a memory drug, some a placebo drug and some no treatment. The exam scores (%) are shown below for the three different groups: Memory _ Placebo No Treatment Drug 7'0 37 3 77 43 10 83 50 17 90 S7 23 2;Q31L Mean 83.40 50.00 18.60 Variance 112.30 109.00

Parameters Jane is a stats keeper for the local youth soccer league. At the end of the season, she calculated the average number of passes completed in a game for a random group of 35 players to be 16.5 passes, their pass accuracy to be 55%, and that 17 of the players were left-footed. In contrast, the average number of passes completed in a game

A company in the furniture industry purchases wood boards from two suppliers. Each supplier ships the boards in batches of boards that are checked upon receipt. This control allows to conclude that the board is either compliant or non-compliant. The results of the inspection of two batches of pieces are presented in the table below. Result of the

I wanted to make sure my answers are correct and if I could get help with E & F. Thank you! The table to the right shows the movie preferences for action/adventure, comedy and dramas for males and females. Complete parts a) through f) below. Male Female Action/Adventure 152 85 Comedy 113 132 Drama 59 163 a) Determine the probability of selecting a

v1 2 3 4 5 Espa Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury (mmHg), for a

KE X + ontent.com/medmath/page/mod4u2quiz?type=question-list&page_type=6263001 2 3 of 3) iven data that is symmetrical and mound shaped, with a mean of 100 and a standard deviation of 5, using the empirical rule data that is 1 standard deviation from the mean? Separate your answers with a comma. Clicking any button other than the Save Answer

Fill in the blanks options are given below Find the mean and the standard deviation for the data given below. (Assume to be sample data) 2-3 4-5 6-7 8-9 10 - 11 3 11 15 10 Mean Choose... Standard Deviation Choose... #

A manufacturing company's quality control personnel have recorded the proportion of defective items for each of 500 monthly shipments of one of the computer components that the company produces. The data are in the file P07_07.xlsx. The quality control department manager does not have sufficient time to review all of these data. Rather she would

The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1120

Help me 0 Question 1 v III/OH pt '0 5 8 4 (9 Details The student council is hosting a drawing to raise money for scholarships. They are selling tickets for $7 each and will sell 700 tickets. There is one $3,000 grand prize, three $200 second prizes, and sixteen $40 third prizes. You just bought a ticket. Find the expected value for your profit.

A random sample of 34 recent college graduates results in a mean time to graduate of 4.58 years, with a standard deviation of 1.10 years. a. Construct a 95% confidence interval for time to graduate with a bachelor's degree. b. Construct a 99% confidence interval for time to graduate with a bachelor's degree

AaBDC 1 Normal Heading Paragraph Style The following table shows 1.000 nursing school applicants, classified according to scores made on a college entrance exam and the quality of the high school from which they graduated. Use the data in the table to answer the questions that follow. Score Poor (P) Average (A) Superior (S) Total Low (L) 105 60 55

Y= -0.0952x + 194.8 R 2 = 0.0139 1.providing ashort paragraph (not bullet points)that will include the requested information for your given 2.The LSR and coefficient of determination. 3.Interpret the slope of the LSR in context of the number. 4.Interpret the coefficient of determination in the context of the number and explain why, or why not, the

Covariance Matrix (X,Y) COVARIANCE MATRIX X Y X 625 140 Y 140 64 15. What is the standard deviation of X? Group of answer choices 8 140 25 none of these choices

This question: 2 point(s) possible Find the regression equation, letting the first variable be the predictor (x) variable. Using the listed actress/actor ages in various years, find the best predicted age of the Best Actor winner given that the age of the Best Actress winner that year is 28 years. Is the result within 5 years of the actual Best

Item 14 The contingency table below shows the results of a survey of video viewing habits by age. Viewer Age Video Viewing Platform Preferred Row Total Mobile/Laptop Device TV Screen 18 to 34 39 35 74 35 to 54 8 8 16 55+ 2 8 10 Column Total 49 51 100 Find the following probabilities or percentages: (a) Probability that a viewer is aged 18 to 34.

1. Given a fair coin, find the distribution of outcomes for 13 flips of the coin. Note: Use binomialpdf. Fill in your distribution using the common denominator of 8192. 2. Confirm your result for 5 heads/8 tails using the formula given in class. Show formula and steps. 3. Create a histogram from your

This question is similar to the type of question you may encounter in one of the online numeracy quizzes. However, while the numeracy quiz requires an answer only, for this assignment submission you must also include your workings. Find the intercept and the slope of the straight line (i.e. the linear equation) containing the points (-3, 4) and

Question 8 D Question 8 10 pts When it is sunny, Joe's ice cream truck generates a prot of $522 per day, when it is not sunny, the prot is $233 per day, and when the truck is not out there selling ice cream, Joe loses $117 per day. Suppose 8% of a year Joe's truck is on vacation, and 86% of a year the truck is selling ice cream on sunny days, what

A family therapist wants to predict the number of children in a family based on the family's household income. The therapist thinks that a higher income will be associated with having more children on average. The outcome variable is Child (the number of children in a family) and the predictor variable is Income (the household income in thousands

D Question 7 2 pts An analysis of data on fertility and infant mortality rates for several French-speaking provinces in 19th century Switzerland suggests that the infant mortality rate increases as the fertility rate increases. A test for independence between these variables indicates a P-value of 0.00359. At the 0.05 significance level, these

Question 15, 6.2.21-T HW Score: 26.67%, 4 of 15 points ('3 Part 1 of 3 0 Points: 0 of 1 [n a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.4 minutes. A 90% esearching commute times to work. it was found that the condence interval using the t-distribution was calculated to be (285,385).

Safari t View History Bookmarks Window Help Q Mon Sep 20 11:52 AM of 7 - ZOOM + 7. Perform the following integral. SEP 20 " tv

I need help with answer as quickly as possible please! Thank you question is long. there are parts 1 and 2. please include the degree of freedom for the problem and answer part 2 question d as yes or no Executives at The Thinking Channel have decided to test whether the educational backgrounds of the channel's viewers are different from the

ll A researcher in biochemistry is attempting to summarize the results oi an experiment. The experiment involved measuring enzyme activity under a variety of conditions. The analysis has yielded the following statistics from a sample of conditions: A 95% confidence interval for the mean enzyme activity is: (161.4, 165.6) 0 (1588,1682) o

I need to understand how to do this please make it as clear as possible for me to readed Central Limit Theorem for Sums Suppose random samples of n - 50 are collected from an unknown distribution with the properties u = 44 and o = 3. a. Determine the mean of EX. b. Determine the standard deviation of EX. (Include four decimal places.)

1) what does mean allow you to see in female smoking rate by country dataset? what does median allow you to see in female smoking rate by country dataset ? what does range, Q1, Q3 and IQR allow you to see in female smoking rate by country dateset ? what does z score allow you to see in female smoking rate by country dataset? what does variance

QU ESTIO N 3 In a survey is among adults of 42% male and 58% females, there are 25% of male using bank transfer at ATM to make a payment for their online shopping, while 50% of female using FPX getaway for online purchase. a. Draw a tree diagram based on the information above (3 marks) b. If an adult is selected at random, nd the probability that

a) A brand head manager found that 73% of the customers are teenagers. Majority of them prefer ewallet payment. The probability that a customer prefers ewallet payment given that the customer is a teenager is 0.85. If a customer is not a teenager, the probability that he/she prefers ewallet payment is 0.23. (ii) Compute the probability that a

Below are four bivariate data sets and their scatter plots. (Note that all of the scatter plots are displayed with the same scale. ) Each date set is made up of sample values drawn from a population 1.0 4.4 XXX 1.0 7.8 2.0 6.7 2.0 9.4 3.0 7.9 3.0 6.9 4.0 9.5 4.0 5.5 5.0 9.7 5.0 8.0 6.0 9.9 6.0 4.8 7.0 8.9 7.0 4.7 8.0 82 8.0 7.1 9.0 6.0 9.0 5.8

Listed in the company table are weights of samples of the contents of cans of regular Coke and Diet Coke assumed the two samples are independent simple random sample select it from normally distributed populations do not assume that the population standard deviations are equal.Provide Test statisticP Value Conclusion for the test Confidence

A management recruiter wants to estimate a linear regression relationship between an executive's experienoe and the salary the executive may expect to earn after placement with an employer. From data on 23 executives, which are assumed to he a random sample from the population of executives that the recruiter places, the following regression

The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,996 kilowatt hours (kWh) of electricity this year. A local power company believes that residents in their area use more electricity on average than EIA's reported average. To test their claim, the company chooses a random sample of 138 of their

3. {14 marks} A. gardener plants Z tomato seeds. The le tomato . txt lists the heights of the seedlings after 3 weeks. a. f 2 marks} Create a histogram of the tomato heights. Be sure to choose the number of bins such that the histogram shows the main features of the data. {1 marks} Describe the skewness (or symmetry} of your histogram. {1 mark}

The first Stat exam had a mean of 80 and a standard deviation of 2 points; the second had a mean of 65 and a standard deviation of 8 points. Reginald scored an 80 on the first test and a 77 on the second. Sara scored an 86 on the first test but only a 61 on the second. Although? Reginald's total score is? higher, Sara feels she should get the

MCA Math Practice Name MCA Math Practice Name Grade 4 WEEK 10 Grade 4 WEEK 11 Use these coins to answer question I. Which pair of figures appear to be congruent? HEADS TAILS A coin is tossed 10 times. How many times would the coin be expected to land with heads up? A. 2 out of 10 from CS 3 out of 10 coun U 4 out of 10 5 out of 10 Linda is buying 5

[10 pts + 2 bonus] A research group is concerned about reaction to a stimulus by airplane pilots for a particular cockpit arrangement. The experiment was conducted in a simulation laboratory, and 15 pilots were selected with an average reaction time of 3.2 seconds with a sample standard deviation of 0.6 second. It is of interest to characterize

A conical water tank with vertex down has a radius of 10 feet at the top and is 28 feet high If water flows into the tank at a rate of 20 ft / min, how fast is the depth of the water increasing when the water is 15 feet deep? The volume of a circular cone is V = where r if the radius of the base and h is the height of the cone The depth of the

A bolt manufacturer is very concerned about the consistency with which his machines produce bolts. The bolts should be0.24centimeters in diameter. The variance of the bolts should be0.03. A random sample of17bolts has an average diameter of0.23cmwith a standard deviation of0.2846. Can the manufacturer conclude that the bolts vary by more than the

The model with two way interaction terms for a multinomial logistic regression model attached models data from a survey that collected information from N students in their final year of high school, about substance use including variables alcohol (yes or no), cigarettes (yes or no) and marijuana (no/low, medium, high), and sex (male/female). Using

Among the 4 tests below, ____ is a parametric significance test. Mann-Whitney U test Wilcoxon Signed Rank t test Independent sample t test Kruskal-Wallis One-Way ANOVA by ranks Which of the following is NOT true about parametric modeling _ ? Requires larger training data than nonparametric modeling make assumptions about the form or shape

answer this questions in details 1) On the basis of past experience, the probability that a certain electrical component will be satisfactory is 0.98. The components are sampled item by item om continuous production. In a sample of ve components, what are the probabilities of nding (a) zero, (b) exactly one, (c) exactly two, (d) two or more

a) A business gets a keypad door lock. The lock has digits from zero to nine and a set code can be the length of 4. How many options exist for employee ID's if the first digit cannot be a 0 and the remaining digits must be different from one another? Show your work and explain. b) Its Halloween and everyone is out trick-or-treating. There are 20

Suppose z is the standard normal variable. Draw the normal curve for each of the following probability statements to visualize the required area. Report answers accurate to at least 4 decimal places. a. P(-2.45 -0.93 and z > 1.11) c. P(z > 0.89 and z -0.36) = f. P(z > 1.02 given z > 0) = g. P(z 2.16) =

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