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january 2021
18

Mathematics Questions and Answers January 18, 2021

Expert-verified solutions to help you succeed

Travel to Outer Space A CBS News/New York Times poll found that 329 out of763 randomly selected adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with97 % accuracy. Round your answers to at least three decimal places. Travel to Outer

A carnival game consists of drawing a ball from a jar while blindfolded. A jar contains a total of 10 balls: 1 green, 2 yellow, and 7 red. If you draw the green ball, you win $10; if you draw the yellow ball, you win $2; and if you draw a red ball, you don't win anything. The game costs $2 to play. Below is the probability distribution table for

A pharmaceutical firm wishes to allocate P50,000 towards advertising in newspapers and magazines. The intension of the firm is to maximize the exposure of its advertisements. Each page of the leading newspapers costs P500 and each page of a magazine costs P1000. It is guaranteed that each page of the magazine will reach the audience of 250,000,

Exercise: Medical researchers conducted a study to determine whether treadmill exercise could improve the walking ability of patients suffering from claudication, which is pain caused by insufficient blood flow to the muscles of the legs. A sample of49patients walked on a treadmill for six minutes every day. After six months, the mean distance

Help me on this question please An ankle reported that, in a study ofa particular wafer Inspection process, 356 dies were examined by an inspection probe and 235 of these passed the probe. Assuming a stable process, calculate a 95% (twosided) condence interval for the proportion of all dies that pass the probe. (Round your answers to three decimal

Share an article that contains statistic about standard deviation (or variance) and identify the sample standard deviation. Reply

A community college has 7664 students currently enrolled in classes. To gain the students' opinions about an upcoming building project, the college president wishes to obtain a simple random sample of 8 students. He numbers the students from 1 to 7664. Complete parts (a) and (b) below. Click the icon to view the random number table. (a) Using the

\f1. Researchers conducted an experiment to compare the effectiveness of four new weightreducing agents to that of an existing agent. The researchers randomly divided a random sample of 50 males into five equal groups with preparation A1 assigned to the first group, preparation A2 to the second group, and so on. The fifth group was given the

PART-C (Any Five) (50 Marks) 10. The data represent number of workers of a company who were sick per day on 30 working days: 30 46 15 21 28 45 36 46 58 45 46 40 52 58 34 48 38 57 30 52 45 22 37 44 14 26 35 25 40 (1)Display the data set with a stem and leaf diagram. (ii)Construct a frequency distribution by taking class interval 10 (iii) Draw ogive

help me on this question? A CI is desired for the true average stray-load loss , (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with a = 3.3. (Round your answers to two decimal places.) (a) Compute a 95% CI for u when n = 25 and x =

For a random sample of size2, obtain the probability that the sampling error made in estimating the population mean by the sample mean will be 1 inch orless; thatis, determine the probability that x will be within 1 inch of . Interpret your result in terms of percentages. The probability is ? ( help me answer this The data in the table represent a

to the way in which the data were given in their article. Life Satisfaction Independent Variables M SD F p Sex 0.68 409 Men 3.99 0.51 Women 3.94 0.49 Age 3.04 029 20s 3.85 0.42 30s 4.03 0.52 40s 3.97 0.57 50s 4.02 0.50 Marital status 12.46 000 Single 3.85 0.48 Married 4.10 0.50 Divorced 4.00 0.35 Education 0.82 536 High school 3.92 0.48

You want to estimate the average number of U.S. states that people living in the United States have visited. If you asked only those that were at least 40 years old would you expect the estimate to be too high or too low? What kind of estimate would you expect if you select your sample only from those living in Rhode Island?

Need help in all these questions boxes that need to be filed out Question 13 This Test: 20 pts possible Submit Test Based on a survey, assume that 37% of consumers are comfortable having drones deliver their purchases. Suppose that we want to find the probability that when five consumers are randomly selected, exactly two of them are comfortable

This is a 2 part question, Scientists believe that Earth once had 9 trillion tons of a naturally existing plutonium isotope (back when the Earth was formed). Given a half-life of 26,000 years to V that specific plutonium isotope and the Earth's current age of 4.6 billion years, how much would remain today? Use your answer to explain why this

1.What proportion of Broward College students have a dependent child to care for? In a survey of 850 students at Broward College, 230 had a dependent child to care for. Test the claim that the proportion of students that have a dependent child to care for is greater than 25 percent. Use a significance level of .05. What is the claim to be tested?

Data was collected for 4D randomly selected honey bee hives on a farm. The number of parasites found in each hive was recorded. The data is summarized in the histogram below. 35 40 45 5t) 55 5E 55 t} 3'5 parasitesinhive Q What is the maximum possible number of parasites for the class containing the value 4?? Note: Each class contains its lower

The data below shows coffee consumption for several people. Age Light Moderate Heavy

Suppose that 4% of car owners in the U5. own a Tesla. You decide to randomly sample 175 car owners in the US. and record if they own a Tesla or not. You nd that only 10 of them own a Tesla. What is the population proportion? [Select] V What is the distribution of :3 (Le. the mean and standard deviation]? [Select] V What is the probability that,

Each school in a certain district was asked to design a logo for their school using only the colours red, white, green, yellow, and blue. How many different two- colour combinations of logos are possible

Pls help, I filled to understand on those Separable Differential equations and steps. Find the function y = y(x) (for a > 0) which satisfies the separable differential equation dy 9+ 20x dx with the initial condition y(1) = 3.Solve the separable differential equation for u du e 5u+ 2t dt Use the following initial condition: u(0) = 10.\f\f

Question 9 O out of 1.3889 points If two options are mutually exclusive and collectively exhaustive, and you have sufficient evidence to believe that one of the options in falso, then Answers: You may provisionally accept the remaining option as being probably true You may not make any decisions due to a lack of certainty You must continue testing

T-Table Suppose we have independent random samples of size n1 = 420 and n2 = 510. The proportions of success in the two samples are p1= .38 and p2 = .43. Find the 99% confidence interval for the difference in the two population proportions. Answer the following questions: 1. Multiple choice: Which equation would you use to solve this problem? A.

fast rate speed 3. (10 points) According to the exit polls from the 2020 US Presidential election, 58% of white voters voted for Donald Trump. Also according to the exit polls, 67% of all voters in the 2020 election were white. Over- all, Donald Trump received 47% of the votes cast. 'Nhat percentage of Donald Trump's voters were white in 2020'?

Art is often considered the process or product of deliberately arranging elements in a way that appeals to the senses or emotions. Now, describe the function(s) that you seein the art by answering the following questions.Pleasenumber your answers. Do you see a tangent curve in any piece(s) of art? Explain your answer. Are the images art or

)Listen Smoking habits: A group of statistics students conducted a random survey about smoking habits to determine the proportion of GSU students who regularly smoke cigarettes. Of the 250 students surveyed, 38 responded that they regularly smoke cigarettes. Which of the following is a correct statement concerning whether this group of students

Consider the following lime series data : Month 1 2 5 7 Value 24 13 21 14 20 2 15 (a) Choose the correct time series plat. Value 1 2 3 S 7 Month (ii) Value 1 2 3 S 7 Month (iii) Value 1 2 3 S 7 Month (iv) Value 1 2 3 S 7 Month Graph (iill What type of pattern exists in the dater Horizontal pattern Develop a three-month mewinx average for this time

The weekly marginal revenue from the sale of x pairs at tennis shoes is given by the equation below, where Rx) is revenue in dollars. Gill] ' : _ R (x) 33 I].E11x+ H1 ,R[D]=U Find the revenue function. Find the revenue from the sale of 3,900 pairs of shoes. Find the revenue function. Rlx]. Rm = D (Use integers or decimals for any numbers in the

I would like this solved correctly Question 1 Not yet answered Marked out of 1.00 F Flag question Consider the following plot off(x) yA 0.5 0.4 0.3 0.2 Which of the following values would be suitable as an initial value x0 when using Newton's method to find the largest root of the function? There may be more than one correct answer - you should

Determine the standard deviation and interquartile range of the data 20 339 410 467 454 483 417 481 474 391 430 416 338 446 344 432 531 555 423 490 537

All the information is in the question. 1 (a) Let X, = s2)+s3)+s4), where {39)}, {3533)}, and {831)}, are seasonal components with periods 2, 3, and 4, respectively. Find a linear lter {a0,a1,a2,a3,a4,a5} (i.e., a0, . . .,a5 are all nonzero and are the only nonzero coefcients of the lter) such that the output of the lter when applied to {Xt} is a

MGF 1106 Math SECTION 12.2 Measures of Central Tendency Homework: Section 12.2 Homework Save Score: 0 of 1 pt 8 of 20 (0 complete) HW Score: 0%, 0 of 20 pts StatCrunch 12.2.17 Question Help The accompanying table pertains to scheduled commercial carriers for a certain country. Complete parts (a) through (c) below. Click the icon to view the

Please help me solve the following question. Thank you Question 5 Cumulative Probabilities = 0.95 Upper-Tail Areas =0.05 Numerator, dfi Denominator, Denominator, 2 3 5 6 7 9 10 12 15 20 24 30 40 60 120 161.40 199.50 215.70 224.60 230.20 234.00 236.80 238,90 240.50 241.90 243.90 245.90 248,00 249.10 250,10 251.10 252.20 253.30 254.30 18.51 19.00

PLEASE PROVIDE ANS ONLY If a seed is planted, it has 70% chance of growing into a healthy plant. If 7 seeds are planted, find the values of u

5. (20 points) The following data shows prices of three types of fruits over ten years. Year Mango Orange Blackberry 1 50 100 150 2 55 115 155 3 60 100 125 4 55 110 130 5 63 120 120 6 65 110 125 7 70 105 140 8 75 120 170 9 60 130 160 10 65 135 175 Take year 1 as the base year. In that year, Mango, Orange, and Blackberry production were 50, 25, and

This histogram shows the times, in minutes, required for 25 rats in an animal behavior experiment to successfully navigate a maze. Time for a Group of Rats to Navigate a Maze Frequency 8 6 2 6 8 Time in Minutes Which of the following best describes the shape of the histogram? Symmetric O Left-skewed with no outliers O Right-skewed with no outliers

-/1 Points] DETAILS OSINTROBUSSTAT1 6.1.018.PR. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose X ~ N(2, 3). What value of x has a z-score of -0.68? (Enter an exact number as an integer, fraction, or decimal.) X = Additional Materials DeBook [-/3 Points] DETAILS LAROSESTAT3 6.5.032. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The website

Lenovo uses the ZX-81 chip in some of its laptop computers. The prices for the chip during the last 12 months were as follows: Month Price Per Chip Month Price Per Chip January $1.80 July $1.80 February $1.61 August $1.85 March $1.60 September $1.60 April $1.85 October $1.57 May $1.90 November $1.62 June $1.95 December $1.75 This exercise contains

The table displays the probabilities for each of the six outcomes when rolling a particular unfair die. Suppose that the die is rolled once. Let A be the event that the number rolled is less than 4, and let B be the event that the number rolled is odd. Find P ( A or B ). The table displays the probabilities for each of the six outcomes when

QUESTION 1 2 points Save Match the following definitions to the corresponding probability terms. The set of all possible outcomes of a random experiment. a. Probability A function that assigns a real number to each outcome in the sample space of a random b. Sample experiment space A subset of the sample space of a random experiment C. Event d.

please he;p with this question A random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.37 hours, with a standard deviation of 2.34 hours. A random sample of 40 adults with children under the age of 18 results in a mean daily leisure time of 4.39 hours, with a standard deviation of 1.84

A random sample of 50 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $18.21 per car. The population standard deviation is $5.92. Round your answers to two decimal places. (a) State the point estimate for the population mean cost of fast food bills at this restaurant $ (b) Calculate the 95% margin of error. $

QUESTION 4 Suppose that each time an online shopper buys a a bar of soap, he chooses either brand A or brand B. For each purchase after the rst, the probability is 1/3 that he will choose the same brand that he chose on his preceding purchase and the probability is 2/3 that he will switch brands. If he is equally likely to choose either brand A or

A sample of size110 will be drawn from a population with mean36 and standard deviation14 .Use theCumulative Normal Distribution Tableif needed. Part 1 of 2 Find the probability that x will be less than38 .Round the final answer to at least four decimal places. The probability that x will be less than38 is . Part 2 of 2 Find the 25 th percentile of

Exercise 2.5 (Independence) For the resistance test results in Exercise 2.2, the following probabilities have been calculated: 89 40 P(A) = and P(A | B) = 100 43 Assess if events A and B are independent.Exercise 2.2 (Probability of Joint Event) Test results of scratch resistance and shock resistance for 100 disks of polycarbonate plastic are as

C) 6.78 D) 6.80 45) A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: WEIGHT OF TOOTHPASTE Time 7 am. 6.69 6.68 6.79 6.77 6.74 6.76 10 am 6.71 6.72 6.71 6.76 6.75 6.74 1 pm 6.66 6.68

1 The following boxplot was created from a sample of 100 contract values. You would like to use this data to create an estimate of the most likely value within contract values. Given what you can observe from the box plot, which centrality measure would be most appropriate? Contract Value Boxplot O A Median $1,400,000 B. Standard Deviation

please provide excel formulas A bank branch located in a commercial district of a city has the business objective of developing an improved process for serv-ing customers during the noon-to-1:00 p.m. lunch period. The bank collects the waiting time, the number of minutes that elapses from when a customer joins the waiting line to when the customer

Please solve the Statistics Question in 30 minutes with an full explanation. Question 1. In a class of 50 students, 3 got At grade, 4 got A- grade, 10 got B+, 13 got B, 20 got B, 7 got C* and 3 got C. Let X represents the grade obtained by students: a) Find the probability P(X) for each X [marks 3] b) Construct a probability distribution, and

For question "You are a pension consultant who was recently engaged by Awesome Benefit Company (ABC)" (question_id=31090015): Please advise solutions, including following: 1) Produces clear identification of how the tracking and projection model should be created and identifies realistic potential risks. 2) In the maintenance document, describes

THIS IS FOR STATS 4. (16 points) Blackbeard's Phantom Fireworks is considering two new bottle rockets. The company can add both to the current line, neither, or just one of the two. The success of these products depends on consumers' reactions to the products. These reactions can be summarized as good, P(S1) = 0.30; fair, P(S2) = 0.50; or poor,

The crosstabulation data given below show the number of people who rated a customer service representative as friendly and polite based on whether the representative greeted them rst. Complete parts a through d below. Friendlinessl'Politeness Q1 Staff G reeti ng No Yes No 12 2 Yes 17 22 a. Write the hypotheses for the chi-square test for

QUESTION 3. The following cumulative relative frequency table shows the amount of federal tax paid by a sample of 200 small businesses in a fiscal year. Tax Paid Cumulative Relative Frequency $15,000 to under $20,000 22.5% $20,000 to under $25,000 41.0% $25,000 to under $30,000 59.0% $30,000 to under $35,000 75.0% $35,000 to under $40,000 88.5%

Define the population parameter, the appropriate test statistic formula, and if the hypothesis test is left-tailed, right-tailed, or two-tailed. Be sure to set up your hypotheses, too. How did you decide on constructing these hypotheses? What level of significance would you use? Why? The population parameters that you should use for this

1. Topic you decided to measure. 2. Decide on a topic, note that it should be backed up by literature and the variable that you intend to measure is actually measureable.3. Use the literature I uploaded for BFI activity as a guide for constructing a Standardized Test survey.4. Try to accomplish the BFI scoring. The screenshot shall serve as your

Assume that a sample is used to estimate a population mean . Find the margin of error M.E. that corresponds to a sample of size 21 with a mean of 33.9 and a standard deviation of 7.1 at a confidence level of 98%. Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. M.E. = my answer which is wrong

Please solve the following Markov Chain question: (e) (5 points): What is the State-1 sojourn-time probability-mass function, and its associ- ated parameters? (State this completely and clearly).1. (25 total points): Here are P, P2, and P3. In answering the following questions you do not have to provide a numerical answer; it will be suicient to

(1 point) The graphs below show level sets for six different functions, where the red areas represent the the lowest heights and the purple areas are the highest heights. L -2 -3 -3L -3 -3 -2 -1 0 1 2 3 -3 -2 -1 0 1 2 3 -3 -2 -1 0 1 2 3 A B C 3F -3A -3 -2 -1 0 2 -2 -1 0 1 2 -2 0 1 2 D E F Match the following functions with the proper graphs above.

grade 12 data management permutations unit hand written legible solutions preferred thanks! 7. A committee of 5 distinct positions is to be selected from 12 students. In how many ways can this be done if: [8 marks] a) there are no restrictions? b) Hillary must not be on the committee c) Hillary has to be on the committee d) at least Joanne or

answer all parts 3. At a fast food joint, they have a lot to learn about queuing theory. They instruct customers to line up in 3 queues where they are randomly distributed in front of employees during the daily meal period. In addition, they have installed barriers between the three queues so that customers do not go to other queues, preventing

Con el propsito de verificar la exactitud de sus estados financieros, las compaas tienen auditores permanentes para verificar los asientos contables.Supngase que los empleados de una compaa efectan asientos errneos en el 5% de las veces.Si un auditor verifica tres asientos al azar, la probabilidad de que la variable aleatoria X "Nmero de errores

(2 points each) For the following questions, write the letter corresponding to the most appropriate statistical analysis technique on the line next to the story. Answer choices A and B are summary statistics. Answer choices C through L are inference techniques. Each answer choice may be used once, there will be one unused answer choice. Summary

QUESTION 1: You may need to use the appropriate appendix table or technology to answer this question. The increasing annual cost (including tuition, room, board, books, and fees) to attend college has been widely discussed (Time.com). The following random samples show the annual cost of attending private and public colleges. Data are in thousands

please help. will give thumbs up to those who will answer. thank you \f\f\f

A seller on Etsy has decided to get into screen printing t-shirts and is trying to determine which of their products is the most popular. Currently they have four products - patrons can choose either a red or a black t-shirt, featuring either Eleven from Stranger Things or Offred from A Handmaid's Tale . They want to know if there is a difference

6. Horticulturalists at Longwood Garden in Pennsylvania reported that the number of new leaves sprouting in the first 10 days of spring in the population of magnolia trees in the United States follows a normal distribution with population mean of 12 leaves and population standard deviation of 2 leaves. Fill the blanks in the following statements:

Required Information An article presents measurements of total sollds, In g/L, for seven sludge specimens. The results are 19. 6. 26, 43, 25, 20, and 32. Assume the distribution of total solids Is approximately symmetric. An environmental engineer claims that the mean concentration of total solids Is equal to 18 g/L. Can you conclude that the

to The standard normal probability tal to the left of z = 1.17 is .8790. The area ability of 13 or fewer errors is given by the sha Exercises Methods 26. A binomial probability distribution has p = .20 and n = 100. SELFtest a. What are the mean and standard deviation? b. Is this situation one in which binomial probabilities can be approximated by

1.When you use Excel to calculate the p-value for a simple comparison, which components will you have in the formula? a.numerator and denominator b.denominator and variance c.t-distribution and degrees of freedom d.t-distribution and standard error 2.How can you use Excel to quickly calculate multiple correlation coefficients? a.Have Excel add the

Would you please assist with the question? My answer 0.5000 seems to be wrong. Please help? On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 321 pounds and a standard deviation of 43 pounds. The cow transport truck holds 15 cows and can hold a maximum weight of 5145. If 15 cows are randomly selected

Statistics and Probability Let X be a continuous symmetric random variable with unknown median m of X. The following is n = 15 samples of X: 2.88 3.67 2.76 2.34 2.53 3.20 3.25 3.16 3.76 3.96 3.52 2.36 2.62 3.06 3.16 You are asked to test the null hypothesis m = 3 against the alternative hypothesis that m

May 2016 Average May 2017 Average Temperature, Temperature. The average daily temperatures in c, for California, during May 2016 and May 2017, are given Day California California to the left. 8.6 10.1 9.5 Create a scatter plot of the daily temperatures for May 2016. 8.9 9.5 Include the treandline on the plot. 10.9 7.5 11.8 7.9 Include the equation

A local ice cream shop kept track of the number of cans of cold soda it sold each day, and the temperature that day, for two months during the summer. The data are displayed in the scatterplot below: The one outlier corresponds to a day on which the refrigerator for the soda was broken. Which of the following is true? Group of answer choices If

Q2. [9 marks] The Dow Jones Travel Index reported what business travelers pay for hotel rooms per night in major U.S. cities. The average hotel room rates for 20 cities are recorded. 163 177 166 126 123 120 144 173 160 192 125 167 245 146 139 134 167 162 145 207 a) Calculate the mean hotel room rate manually, show all your steps. [1] b) Find the

A machine in a fruit canning factory puts quantities of sliced peaches into tins. The machine is set so that the mean mass of the contents is 120.4 g. The machine breaks down and after repair, six tins are selected and their contents weighted. The weights of the contents were, in grams: 122.1 119.9 121.3 119.4 121.7 120.9 Stating any necessary

QUESTION: ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4. A survey of 500 Alaska scores showed a mean of 21.0. If the population standard deviaijon in each case is 3, can we conclude the national average is greater than the Alaska average? Use a: 0.05 and use '11 for the nationwide mean ACT score. (a) State the

Numerical Inductive Reasoning Solve with explanation An apparel manufacturer is examining charges for advertisements in fashion magazines. [ Advertising Charges Chart ] Proposal A Proposal B Proposal C Proposal D Proposal E| Proposal F Size 0.5 (pages) 0.25 0.25 2 0.5 Number of characters 10 28 14 86 30 30 Number of photos 3 2 6 2 3 Number of

I am stuck please help! Thank you! The owner of Oak Hill Squirrel Farm deposits $3,000 at the end of each quarter into an account paying 2.5% compounded quarterly. What is the value at the end of 6 years, 6 months? (Round your answer to the nearest cent.) $ Need Help? . [40.68 Points] SMITHNM13 11.5.050. ASKYOURTEACHER l PRACTICEANOTHEI Clearlake

1.In 1979 the annual median household income in the U.S. was $28,220. In 2019, the annual median household income in the U.S. was $68,703. The CPI in 1979 was 72.6 and in 2019 the CPI was 255.8. a.How much would a salary of $28,220 in 1979 be in 2019 dollars? Is that more or less than the actual median household income of $68,703 in 2019? b.A

See the attached screenshot, please answer both parts of the question. Thank you. 8. Sam hasn't realized it until just now, but the ball he lost in the tree was taken by a squirrel yesterday. The squirrel took Sam's ball all the way to downtown Chicago, to the peak of Willis Tower. Butterfingers the Squirrel then dropped Sam's ball from the top of

Pt 3 5. A website has visitors list the books they've read and rate books. Books can also be tagged with keywords such as "vampires" or "mystery" to describe the contents. For a sample of 15 books each, the mean ratings for three different tags ("dinosaurs", "pirates", and "vampires") are found to be 4.2, 3.93, 4.08. An ANOVA table for the data

14 The contingency table below shows the results ofa survey of video viewing habits by age. Video Viewing Platform Preferred Viewer Age Mobile/Laptop Device TV Screen now Total 1 83 4 3 5 3 8 7 3 355 4 9 9 1 E 5 5 + 3 6 9 Column Total 47 53 100 Find the following probabilities or percentages: (3) Probability that a viewer is aged 1834. (Round your

Question 1 5.0 points possible lgraded. results hidden] In this question you will consider how the number of possible assignment vectors Z changes with different experimental designs. For each of the following types of design, find the total number of possible {unique} assignments Z for n = 12 experimental units. Enter each answer to the nearest

Among 146 positive test results, 25 are false positive. Among 159 negative results, 2 are false negative.Find the probability that a randomly selected subject tested negative or did not use marijuana. lowing results from a test for marijuana use, which is provided by a certain drug testing company. Among 146 subjects with positive test results,

Large samples of women and men areobtained, and the hemoglobin level is measured in each subject. Here is the95% confidence interval for the difference between the two populationmeans, where the measures from women correspond to population 1 and the measures from men correspond to population2: 1.76g/dL <12 <1.62g/dL. a. What does the confidence

2. (25 points) 619 Students from grade 11 and grade 12 of Yorktown School are randomly selected. Selected are asked the question Do you own a cell phone? Following contin- gency table gives information on their response: Do you own a cell phone? Yes No Total Grade 12 77 11 16 Total 93 404 481 122 138 526 619 (1) (12.5 points) What is the

Heather is the general manager for a business. One of Heather's tasks is to assign extra projects to her employees. These extra projects are supposed to be assigned following a particular order. The extra projects result in additional pay, so the employees are concerned that the extra projects are assigned following the proper procedure. Errors do

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

The data presented in the table below resulted from an experiment in which seeds of 4 different types were planted and the number of seeds that germinated within 4 weeks after planting was recorded for each seed type. At the .05 level of significance, is the proportion of seeds that germinate dependent on the seed type? Observed Frequencies Seed

Weighted Least Squares 5. (Weighted Least Squares) Consider the simple linear regression model 1%: = 50 + 51% + 5i where E03,) 2 0 and the errors are independent, but Var(5,) = 02/19,, where the w, are known constants, so the errors do not have equal variance. Because the variances are not equal, the standard theory does not apply. Intuitively, it

Could you please help me understand this answer please? Shouldn't the variable c?2 that they included in the variance affect the whole equation? (e.g.) Var(X)(x?2)= c?2(E[X))..... 615 pullits (ylauEu mine whether each of the following statement is true (i.e., always true) or false (i.e., not always true) 1. Let X be a random variable that takes

Question 13

14. A paper in the May 2002 issue of The Journal of Pediatrics presented the results of research on various characteristics in children of diabetic mothers. The studies have shown that maternal diabetes results in obesity and blood pressure complications in the offspring. For a random sample of 16 children with diabetic mothers with mean arterial

In details please and organized By Hand and Tables questions 10-15 These questions will require a bit of work to be shown. Maybe even algebra. (If needed you can use the 1-Var Stats button on the TI to get the basic info to complete by han Also you can use the chart or calc to get your z or t score.) Do not use the Empirical rule. 11. According to

Probability of one electric device failure is 0.01. If a sample is chosen of 400, what is probability that exactly 2 are defective plZz answer a) Find the coefficient of variation (C.V) for the following price of a commodity. Price (X): 8, 13, 18, 23, 30. b) Probability of one electric device failure is 0.01. If a sample is chosen of 400, what is

Please see attached In the 1992 presidential election, Alaska's 40 election districts averaged 2157 votes per district for President Clinton. The standard deviation was 573. (There are only 40 election districts in Alaska. ) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President

Circle your answers when necessary. Solutions without work or reasoning may not receive credit. This HW is worth 15 points. 1. Are the following samples independent or dependent (paired)? As part of a marketing experiment, a department store regularly mailed discount coupons to 25 of its credit card holders. Their total credit card purchases over

d. The expected value of the test statistics is 9.21 and the critical value is 5.72, hence we conclude that the amount of smoking is dependent on seat belt usee. The expected value of the test statistics is 5.72 and the critical value is 9.21, hence we conclude that the amount of smoking is independent of seat belt usef. The expected value of the

Consider a box with 5 tickets, numbered from 1 to 5. We will draw 200 times with replacement from this box. (a) The expected value of the sum of draws is _ and the standard error is _. (b) Modify the box model to keep track of the number of odd numbers out of the 200 draws. Include the values on the tickets, the number of

The lifespans of 32 tigers in captivity are normally distributed. The average tiger lives 22.4 years; the standard deviation is 2.7 years. (a) Use the Empirical Rule to estimate the probability of a tiger living between 25.1 years and 30.5 years. % (Do not write the % sign.) (b) Do not use the Empirical Rule for this question. About how many

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