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Mathematics Questions and Answers January 02, 2022

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The null and alternate hypotheses are: Ho:Mean 1 is equal to Mean 2 H1:Mean 1 is not equal to Mean 2 A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12.A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard

Suppose an Internet retailer would like to investigate the linear relationship between the amount of time in minutes a purchaser spends on its Web site and the amount of money he or she spends on an order. The table to the right shows the data from a random sample of 12 customers. Complete parts a through c. Time Order Size Time Order Size 19 $67

The heights of a sample of 50 players on the 2013 Baltimore Ravens football team were obtained. A dotplot of those heights, in inches, is shown to the right. State whether the distribution is (roughly) symmetric, right skewed, or left skewed. 68 70 72 74 76 78 80 Height (inches) A dotplot has a horizontal axis labeled Height in inches from 67 to

3. Use the fundamental theorem of calculus to evaluate the integral d ex In u' du dx J1
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using your own ideas, come up with some reasons why the two groups of people (working class and upper class) might have different standard deviations (not differences in averages) regarding their pet ownership patterns. [Note: This question is just looking for some social reasons, not statistical

The official conducts a two-sample t-test to determine whether these data provide significant evidence that students at University 1 are eating less than students at University 2. The test statistic is t = 3.2 with a P-value 0.0009.Which of the following is an appropriate conclusion? The samples provide significant evidence that students from

Relationship Longevity African American Couples Latino Couples X1 = 18.4 years X2 = 24.1 years s1 = 8 years s2 = 9 years N1 = 25 N2 = 23 Use the t distribution table that follows to find the critical t-score, the value for a t-score that separates the tail from the main body of the distribution, forming the critical region. To use the table, you

need help finding Z-score and Margin of Error (b) Choose an SRS of 1000 men from this population. Now what is the probability that x falls within +2 mg/dL of #? (Enter your answer rounded to three decimal places.) probability: Incorrect The larger sample is much more likely to give an accurate estimate of /
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A random sample of 5,535 physicians in Colorado showed that 3,332 provided at least some charity care (i.e., treated poor people at no cost). LO USE SALT (a) Let p represent the proportion of all Colorado physicians who provide some charity care. Find a point estimate for p. (Round your answer to four decimal places.) (b) Find a 99% confidence
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Let a and b be the lengths of the semimajor and semiminor axes of an ellipse respectively. Draw a rectangle whose two sides are tangent to the ellipse and the other two are normal to the ellipse. Find the area enclosed by the locus of the vertex of the rectangle at which the normals meet. The figure shows a triangle divided into six regions using
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Which type of visual uses a separate and distinct area for each piece of information on an x and y axis? Multiple choice question. pie chart bar graph pie graph frequency chart

Select the correct answer. The circle is rotated around the horizontal dashed line. Which type of geometrical figure will be generated? An image shows a circle with a dotted horizontal line passing through the center point. A. ring B. cylinder C. cylindrical shell D. sphere

24.A basketball player with a poor foul-shot record practices intensively during the off season. He tells the coach that he has raised his proficiency from 50% to 75%. The coach is dubious, and asks him to take 10 shots. The player makes 8 of them. Did the player prove that he has improved? You are going to conduct a hypothesis test. Let p be the

Determine the open intervals on which the graph of the function is concave upward or concave downward. ( f ( x ) = x2 - 4x +7 concave upward (00, 2) X concave downward DNE
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Hello, Please help me (I really need help with this problem) write program in SAS for task # 1 and most importantly, conduct a full analysis of the results, including testing the hypothesis, F-values ??and other things, problem required a full analysis of the results. Problem #1: RCBD with subsampling Five evaluators (A, B, C, D, E) rated four
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URITY Application add - ins X RNING have been disabled Enable Content* Regression - Estimation X Question 27 ( 4 points ) B C D An important application of regression in manufacturing is the estimation of cost of Production Volume ( units ) Total Cost ( 5) production . Based on DATA from Ajax Widgets relating cost ( Y) to volume (X ) . what is the
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You are developing an ordinary least squaresbased predictor and have been given a data set with n examples with d real-valued features. You decide to expand the feature space by adding as well as multiplying pairs of features; that is, you create d * (d - 1) additional features. Your method performs a straightforward formulation to find the
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The multiple regression equation has several _________________ and one _____________________.

1.What percentage of data would you predict would be between 25 and 50 and what percentage would you predict would be more than 50 miles?Use the Week 4 spreadsheet again to find the percentage of the data set we expect to have values between 25 and 50 as well as for more than 50.Now determine the percentage of data points in the dataset that fall

Five cards are dealt from a well-shuffled deck of 52 cards. What is the probability that the hand will contain: a) 2 tens and 3 fives? b) Exactly 2 two's and two other cards that are not twos? c) Three of a kind? ( three cards the same and two other cards not the same as the three of a kind and not the same as each other)

Carlos is conducting a survey on campus. One of his questions asks students to report how healthy they are on a scale of 1 to 5, where 1 = not healthy at all and 5 = very healthy. When he looks at the data he sees that most people rated their health as a 4 (somewhat healthy) or 5. What type of data did Carlos collect? Group of answer choices a.

Does the variable indicating whether a professor had tenure or not considered quantitative variable

please answer the following question 1.There is a risky portfolio composed of two stocks: JJH and VMN. Stock JJH has an expected return of 18.00% and a standard deviation of return 34.00%. Stock VMN has an expected return of 13.00% and a standard deviation of return 19.00%. The correlation coefficient the two stocks (in terms of their return

Hello this is MATH 131 calc 1 homework questions I need help please You need to hand in the following questions. Vol 1: Sections 1.1, 29, 39, 43, 45 Section 1.2, 71, 73, 95, 97 Section 1.3: 123, 125, 127, 155, 161 To find the questions this is the textbook link just paste it on google OpenStax Calculus, Volumes 1,

Which of the following pairs of variables is likely to have a positive correlation? Check all that apply. Years of education and salary The square footage of a home and its price A person's height and their favorite color The number of miles run and the number of calories burned The speed of a car and the time to its destination

Professor- from the chapter reading this week we learned some basics about statistics that can provide back up for your DQ claim that both of these statements can be true. The reason they both can be true is the fact that this is an example of inferential statistics or a statistic that is taken from a certain population of a larger group.

State the appropriate null and alternative hypothesis and find the critical value for a right-tailed test with = 0.05 and n = 18. Use 2 = 196.

Answer the following: 3) Consider the curve given by the equation y' - xy = 2. It can be shown that dy dx 3y- - x (a) Write an equation for the line tangent to the curve at the point (-1, 1). (b) Find the coordinates of all points on the curve at which the line tangent to the curve at that point is vertical. (c) Evaluate d' y at the point on the
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Yes, there was a significant relationship between autonomy and job satisfaction. The p-value for this test was 0.000, which is lower than the alpha level of 0.05. This indicates that the results of the study were statistically significant, and that the relationship between autonomy and job satisfaction is real

Would you favor spending more federal tax money on the arts? Of a random sample of n, = 207 women, , = 68 responded yes. Another random sample of n2 = 187 men showed that /2 = 51 responded yes. Does this information indicate a difference (either way) between the population proportion of women and the population proportion of men who favor spending
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Which statement represents information that can be considered common knowledge? Pick the correct answer The total number of out-of-state students enrolled at the University of Central Florida in 2006 was 3,290. The University of Central Florida was originally named Florida Technological University. The University of Central Florida is located in

1. A sample of n = 25 observations is drawn from a normal population with = 1,000 and = 250. Find P (X > 1,050) 2. The manufacturer of packs of vegetables that are supposed to have a net weight of 6 ounces tells you that the net weight is a normal random variable with a mean of 6.05 ounces and a standard deviation of .18 ounces. Suppose that you

Statistics IX x"2 Sample Mean 1.8 3.24 population mean "p" 1.7 2.89 2.4 5.76 population Standard deviation "o" 2.3 5.29 Standard Error ofthe Mean 1.1 1.21 1.7 2.89 Must Calculate "Ttest" 1.5 2.25 2.4 5.76 estimated Standard error of the mean 1.9 3.61 Tobtain 1.2 1.44 What ifit is suppose to be a one tail test? 18 34.34 T-critical (two-tails @.05)
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OK I so need help....I have tried to solve this but I can't. I thought if I had the formula I could just plug in the numbers. I just do not understand how 5.83% and 9.81% is the answer.... I get 7.87% and 7.76%....using 7.82% as the average meanwhat am I doing wrong??? This is the problem, I have been asked to solve construct a 93% confidence

Which of the following is a good rationale to use a factorial design? Group of answer choices Collecting data on a moderating variable will be relatively easy. You expect that the relationship between your predictor and outcome depends on a second factor. You have a DV or outcome measure with poor reliability. You want to find statistically

What would cause SSBG to be zero? To be extremely large? In each situation, are you likely to reject or fail to reject the null hypothesis? What would cause .3ch to be zero? To be extremely large? In each situation, are you likely to reject or fail to reject the null hypothesis
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Find the absolute maximum and minimum values of the following function on the given interval. Then graph the function. f(X) = -x+2, - 1
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According to the National Institute of Allergy and Infectious Diseases, about 3.7% of American adults have a food allergy. A large company plans a lunch reception for its 400 employees. Assume that employees are independent. Let the random variable X be the number of company employees who have a food allergy. Reference: X follows a Poisson

Find the velocity, speed and acceleration at time t = \frac{\pi }{6} of a particle moving along the curve r = cos 2.5ti-3te^{-4t}j+5.5tk

A random sample of 49 measurements from one population had a sample mean of12, with sample standard deviation3. An independent random sample of64 measurementsfrom a second population had a sample mean of14, with sample standarddeviation4.Test the claim that the population means are different. Use level of significance 0.01. Compute the

Then, in 100 to 150 words, explain the data and provide any background information regarding the crime. Last, in 250 to 350 words, identify risk factors that increase the likelihood of being a victim of the crime you selected. Cybercrime

When correlating individual scores to describe the results of research investigations, individuals are measured on two variables, and each variable has a Blank______. Multiple choice question. range of numerical values rank in the ordinal scale of measurement nominal scale of measurement matching variable

Applying a Level of Significance In this task, you'll study the data from two experiments. For each data set, you will determine whether the difference of means between the treatment group and the control group is statistically significant and interpret the result in the context of the situation

Given the following definition, compute Q (5). Q ( n ) =0 if n = 0 2 if n = 1 4 if n = 2 Q ( n 1) + Q ( n 2) + Q ( n 3) if n > 2 Q(5) = ?

This question relates to the previous problem (included below): Abus cor-'npany has a policy of booking as many as 21 persons on a bus that can seat only 21. (Past studies have revealed that only 88% the bus ride.) Find the probability that if the bus company books 21 persons, not enough seats will be available. of the booked passengers actually
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17) A professor has a teaching assistant record the amount of time (in minutes) that a sample of 16 students engaged in an active discussion. The assistant observed 8 students in a class who used a slide show presentation and 8 students in a class who did not use a slide show presentation. With Microsoft Without PowerPoint Microsoft PowerPoint 12
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Here's my question: According to the M&Ms website, each package of Milk Chocolate M&M's should contain 24% blue, 14% brown, 16% green, 19% orange, 13% red, and 14% yellow M&M's. You purchase several bags of M&M's and count each color. In total you have 46 orange, 46 brown, 41 red, 40 yellow, 53 green, and 60 blue, Now, make a frequency table for

I need the solution of this question Q#8. Find the solution of the following integral equation using Laplace transform method [ (t - 2)? y(2)da = -t' +t-sint, 0 (25)
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discharges and determine the actual costs for the discharges. At an alpha of .05, test the claim that there is no difference in the mean discharge costs for the four hospitals

7. Write a quadratic inequality in the form of ax + bx + c that represents the following solution. No fractions in your answer. WINte 8) 3 marks 8. Solve each of the quadratics using a number line and test points. Show your work for full marks. Write answers in SET NOTATION a) x + 6x - 7 5 0 a) 3 marks b) 2x3 + 3x - 5> 0 0
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If the sample mean is 100, z=1.85 and sigma sub x bar=20, what is the interval estimate for population mean? Also what is the level of confidence?

Dr. Hammond would like to conclusively determine whether heavy video game use would cause a decrease in her students' scores on various standardized achievement tests. Which type of research method should she employ? Question 5 options: case studies none of the above experimentation correlational research

How do you find the mean and standard deviation of a data set by using Excel?

The board of directors for a particular company consists of 10 members, 6 of whom are loyal to the current company president and 4 of whom want to fire the president. Suppose the chair of the board (who is a loyal supporter of the current president) suggests to randomly select 4 other board members to serve on a committee to decide the president's

the answer is he average total throughput time (including both waiting and service time) for a customer at Joe's Deli is 8.67 minutes. please redo

The usable lifetime of a particular electronic component is known to follow an exponential distribution with a mean of 6.3 years. Let X = the usable lifetime of a randomly selected component. (a) The proportion of these components that have a usable lifetime between 5.9 and 8.1 years is. (b) The probability that a randomly selected component will

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Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected. What is the probability that the sample contains exactly 4 minorities? (4 Decimal format = 0.0000) Thanks for any help!

Manulife Bank thoroughly Manulife Bank thoroughly investigates its applicants for small home-improvement loans. Their default record is very impressive: the probability that a homeowner will default is only 0.005. The bank has approved 300 small home-improvement loans. Required: (Assuming the Poisson probability distribution applies to this
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Please provide detailed explanation and solutions to the following. Please pay attention to the equations given do not write again accidentally a wrong equation. I would rather for it to be written instead of typed because typing functions is confusing. Thank you Find the equations of the planes tangent to the following surfaces at the specied
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A survey of adults in the united states conducted in may 2015 by the pew research center asked whether they were in favor of allowing gays and lesbian to marry legally. Of 363 conservative republicans samples, 22% were in favor, whereas of 278 liberal democrats, 81% were in favor. Find the estimated standard errors for the sample proportion in

Statistically, buying a house is: Group of answer choices Detrimental to most marriages. The most important financial decision a buyer will ever make. An inexpensive purchase. All answers are correct

Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a survey, the responses of respondents are identified as 100 for a "yes" comma 200 for a "no" comma 300 for a "maybe" comma and 400 for anything else. The average (mean) is calculated for 754 respondents and the result is 256.1

Students under a lot of stress Question 3Select one: a. won't be able to stick to a workout program. b. can only join a gym, which is better than working out on their own. c. can receive stress relief by working out. d. should not exercise

According to distribution, [C & (T v A)] is equivalent to: [(C v T) & (C v A)] [(C & A) v (T & A)] [(C & T) v (C & A)] [(C v A) & (T v A)]

(b) According to a certain survey, adults spend 2.35 hours per day watching television on a weekday. Assume that the standard deviation for "time spent watching television on a weekday" is 1.93 hours. If a random sample of 50 adults is obtained, describe the sampling distribution of x overbar, the mean amount of time spent watching television on a

Directions: Use the p-value method OR the rejection region method to fully answer this Josephina made a 6-sided die in her ceramics class and rolled it 60 times to test if each side was equally likely to show up. The table summarizes the outcomes of her 60 rolls. Outcome1 2 3 4 5 6 Total of Roll Observed 13 11 6 12 10 8 60 Frequency Expected

choose the correct answer from the following choices, and then select the submit answer button. One way to create a simple random sample of n students in a class is to ________________. Write every student's name on a slip of paper, then put all the slips of paper in a hat and mix them well. Draw n slips of paper out of the hat. The students whose

Which of the following statements about sex differences is true, on average? Group of answer choices Males and females solve intellectual problems in the same fashion. Males tend to have weaker special skills and mathematical reasoning. Males and females are far more different than alike. Males are stronger but more fragile and suffer from a wider

Para seleccionar elementos de una poblacin de manera aleatoria simple debes: asegurarte que todos los elementos tengan la misma oportunidad de ser escogidos. definir sistemticamente el escogido. estudiar bien las caractersticas de cada elemento. formar grupos antes de escoger la muestra

Enter an exact number. Submit Answer 19. [-/2 Points] DETAILS SCALC8 1.8.025. Explain, using the theorems, why the function is continuous at every number in its domain. F ( x ) = 2x2 - x - 9 x2 + 9 O F(x) is a polynomial, so it is continuous at every number in its domain. O F(x) is a rational function, so it is continuous at every number in its
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QUESTION: Part (b) will be posted in the comments ( Its a answer first, see next question after) The test statistic of z = - 1.53 is obtained when testing the claim that p
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COVID 19 has brought many changes and reshaped the life of the people around the globe. People in every walk of life are affected one way or the other due to this pandemic. Almost every sector of Pakistan (e.g. business, agriculture, education, manufacturing etc.) is facing numerous challenges. Assume you are interested to conduct a qualitative

The point-biserial correlation squared (rpb2) may be used as a measure of effect when you conduct a(n) ______. Group of answer choices Pearson's r independent-samples t test 2 test of independence one-way between-subjects ANOVA

1.From which statistical test, can we assume causality? A. Regression, because it predicts B. T-test, because it shows differences C. Correlation, because it shows relationships D. None, because that can only be done through theory 2.Which test compares the means of two or more groups? A. Paired t-test B. Regression C. ANOVA D. Independent samples

Data Identification What data would you need to calculate the overall profit that a model is likely to bring? The top speed and the mileage of the model. The predicted sales and the profit margin per unit. The top speed and the profit margin per unit. The profit margin and the mileage of the model

An economist is studying the rise and fall of the stock market. He finds that the average stock price is $63, with a standard deviation of $19. Suppose he wants to identify stocks that are priced in the bottom 35% of all stocks. If he only looks at 100 stocks, what is the highest stock price that he will include in his study? Use the z-table

Find the sales tax for the item. (Round your answer to the nearest cent.) $59 coat in Washington state sale tax is 6.5%

If P ( A ) = .62, P ( B ) = .56, and P ( A B ) = .70, then P ( B | A )=

The data shown below represent the repair cost for a low-impact collision in a simple random sample of mini- and micro-vehicles (such as the Chevrolet Aveo or Mini Cooper). Complete parts (a) through (c). $3190 $1078 $711 $659 $7780 $1771 $3321 $2072 $2643 $1318 Click here to view page 1 of the standard normal distribution table. Click here to
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Use a graphing utility to graph the function. Locate the absolute extrema of the function on the given interval. f(x)=1/x-5 , (5,9)

1 is the slope of the regression line, representing the change in sale price for each unit increase in house size

Assume that the 30 scores are the reading comprehension test scores of a grade 3 class in 2020. You want to determine whether the mean of this class that you obtained above is better than the mean of all the grade 3 classes during the past 5 years 2015- 2019. The mean was =5 with =2. Conduct the five step hypothesis test, using a two tailed with
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6. Question 6 Which of the following scenarios demonstrate analytical thinking? Select all that apply. 1 point You notice that two pieces of data trend in the same direction and investigate them further to check for correlation. You determine your hypothesis to be true because there is nothing in your data to contradict it. You select and design a

A two-way ANOVA is performed and for the interaction effect, the mean square for the interaction (MS-I) is found to be 270. The within-group variation (MS-W) is 45. A table of critical f-ratios tells you that the critical f-ratio for this experiment is 6.21 at the alpha = 0.01 significance level. Is there enough evidence here to show that there is

A man is standing on the top of a 15 foot ladder, which is leaning against a wall. Somescientific minded joker comes up and starts to pullthe bottom of the ladder away at asteady rate of 6 ft/min. At what rate is the man on the ladder descending if he remainsstanding on the top rung when the bottom of the ladder is 9 ft. from the wall?

The distribution of blood types in the United States is as follows, where positive and negative refer to the Rhesus (Rh) factor: O-positive: 37 % O-negative: 7 % A-positive: 35 % A-negative: 6 % B-positive: 9 % B-negative: 2 % AB-positive: 3 % AB-negative: 1 % Is blood type A positive and negative qualitative or quantitative variable?Explain. Help

The human resources department of an engineering company gives IQ tests to a randomly selected group of new hires every year. They claimed that the mean IQ score of new hires, 1 , from this year is greater than or equal to the mean IQ score of new hires, 2 , from last year. This year,50 new hires took the test and scored an average of112.9 points

I am trying to do PIP percentages in excel, but I am unsure of how to do it. Can you help me?

Question 1 Two variables have a negative non-linear correlation. Does the dependent variable increase or decrease as the independent variable increases? Cannot determine from information given Dependent variable increases Dependent variable decreases Dependent variable would remain the same Question 2 What does the variable represent? Homework

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indicate if the following research question is quantitative or qualitative: "What are the experiences of college hockey players who are on academic probation?" Please indicate if the following research question is quantitative or qualitative: "What are the experiences of college hockey players who are on academic probation?" Quantitative

Is it possible to identify the exact values of all of the original service times? A. Yes. The data values in each class are equal to the corresponding class midpoint. B. Yes. The data values in each class are spread evenly across the full length of the class. C. No. The frequency distribution tells nothing about the data values that fall below the
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QUESTION: PART (c)-(d) will be posted in the comments Use the sample data and condence level given below to complete parts (a) through (d). In a study of cell phone use and brain hemispheric dominance, an Internet survey was emailed to 2605 subjects randomly selected from an online group involved with ears. 1061 surveys were returned. Construct a
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(a) Find the p - value for the test statisticz=1.75 for the following null and alternative hypotheses: H0:=50 HA:>50 The p - value is_____ (b) Find the p - value for the test statisticz=1.88for the following null and alternative hypotheses: H0:=50 HA:50 The p - value is_____

To make all subjects think they are receiving the same treatment, what are patients in the control group given? Multiple Choice O a placebo O a 75% dose of the drug O the full dose of the drug O a 50% dose of the drug

content area top Part 1 The accompanying data represent the daily (for example, Monday to Tuesday) movement of Johnson & Johnson (JNJ) stock for 61 randomly selected trading days. "Up" means the stock price increased for the time period. "Down" means the stock price decreased (or was unchanged) for the time period. Construct and interpret a 95%

A confounding variable changes along with the Question 20 options: a. independent variable b. dependent variable c. extraneous variable d. placebo

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