Use the information to construct 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals.Researchers surveyed a random sample of 32 U.S. workers ages 16 years and over who did not work from home and asked how long (in minutes) it takes them to get from home to work. The responses are listed.44 1827 47 37 48 27 27 24 39 16 4418 35 26 39 33 1571 14 11 53 30 54 30 74 41 26 20 45 34 25 59 85From past studies, the researchers assume that o is 17.9 minutes.Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals.The 90% confidence interval is (). (Round to one decimal place as needed.)

The given data is as follows: 2747374827272439164418352639331571141153305430744126204534255985

Answered: Use the information to construct 90%…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A researcher examined the extent of cooperation among kindergarten children. She unobtrusively observes a group of children at play for 30 minutes. The following are the number of cooperative acts exhibited by each child. Construct a 95% confidence interval to estimate the population mean of cooperative acts. Write a concluding statement. 1 5 2 3 4 1 2 2 4 3
In a survey of 3332 adults aged 57 through 85 years, it was found that 80.7% of them used at least one prescription medication. a. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication.
Do part c of the question only.
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In a study examining the relation of math ability to the belief that math ability was innate, the belief was considered the predictor variable. The researcher hopes to find a correlation between the participants’ math ability and their belief that math ability is innate. The scores for the three participants are shown below. The group that believed that math is NOT innate scored 66, 70, 50. The group that believed that math IS innate scored 7, 4,10. what are the mean and SD for each group?
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2-C. Construct and interpret a confidence interval to estimate the mean height of the population. You must first write the formula for the confidence interval and then substitute your appropriate numbers. Person 1 Person 2 Person 3 Person 4 Person 5 Person 6 Person 7 Person 8 Person 9 Height (inches) 69 67 67 64 68 69 58 74 70 Shoe Size 10 9.5 10 9 9.5 11 6 11.5 10.5
Which of the following statements is correct about confidence intervals? A. Higher confidence levels result in narrower confidence intervals. B. Higher confidence levels result in lower standard error of the mean. C. The goal of constructing a confidence interval is to estimate the population mean from the sample mean. D. Both A and C.
.3 The width of a confidence interval is a measure of its precision. The narrower the confidence interval, the more precise is the interval estimate, and vice versa. Describe any three aspects that influence the precision of the width of a confidence interval of a singlepopulation mean.
The 95% confidence interval for the mean contains the sample mean with 95% certainty.TrueFalse
In a study investigating the difference in food preferences between men and women, researchers asked subjects to indicate whether they liked or disliked certain foods. One question was about liking cabbage. Twenty percent of a sample of 75 men liked cabbage, while 41% of a sample of 100 women indicated that they liked cabbage. Provide two confidence intervals, one for the proportion of men who like cabbage and one for the proportion of women who like cabbage. Use a 95% confidence level. State whether or not the populations are different and explain how you know this.

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