In a random sample of 25 people, the mean commute time to work was 31.9 minutes and the standard deviation was 7.2 minutes. Assume the population isnormally distributed and use a t-distribution to construct a 99% confidence interval for the population mean μ. What is the margin of error of µ? Interpret theresults.hisThe confidence interval for the population mean μ is (27.9,35.9)(Round to one decimal place as needed.)The margin of error of u is(Round to one decimal place as needed.)Get more help -Q Search==20,TEDOClear allCheck answer4:31 PM7/16/2023N

Answer The mean =31.9The standard deviation =7.2The sample size =25

Answered: In a random sample of 25 people, the…

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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Mrs. Gallas wanted to estimate the average weight of an Oreo cookie to determine if theaverage weight was less than advertised. She selected a random sample of 30 cookies andfound the weight of each cookie (in grams). The mean weight was = 11.1921 grams with astandard deviation of sx = 0.0817 grams. Make a 95% confidence interval to estimate the truemean weight of an Oreo. 1. What is the formula for calculating the standard deviation of the sampling distribution of x? 2.What condition must be met to use this formula? Has it been met?
A veterinarian wants to estimate the mean weight of a cat in their city. They take a random sample of 19 cats and found a mean of 10.9 lbs with a sample standard deviation of 1 lbs. Find the 95% confidence interval of the mean. Assume that the cat weights are normally distributed. Do not round in between steps. Round answers to at least 4 decimal places.
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In a random sample of 24 people, the mean commute time to work was 34.7 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 99% confidence interval for the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean µ is ( D (Round to one decimal place as needed.) The margin of error of u is. (Round to one decimal place as needed.) Interpret the results. O A. With 99% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. O B. It can be said that 99% of people have a commute time between the bounds of the confidence interval. OC. With 99% confidence, it can be said that the commute time is between the bounds of the confidence interval. O D. If a large sample of people are taken approximately 99% of them will have commute times between the bounds of the confidence interval.
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In a random sample of ten cell phones, the mean full retail price was $433.00 and the standard deviation was $208.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 99% confidence interval for the population mean μ. Interpret the results.
You are going to create a 99% confidence interval for the mean amount ofsugar in coffee shop specialty drinks. You know the population standarddeviation is σ = 5.9 grams. You want your confidence interval to have amargin of error of 0.25 grams. How big should your sample size be to obtainthis margin of error?
In a random sample of 27 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distribution to construct a 98% confidence interval for the population mean μ. What is the margin of error of μ? Interpret the results. The confidence interval for the population mean μ is ,. (Round to one decimal place as needed.) The margin of error of μ is nothing. (Round to one decimal place as needed.) Interpret the results. A. With 98% confidence, it can be said that the commute time is between the bounds of the confidence interval. B. If a large sample of people are taken approximately 98% of them will have commute times between the bounds of the confidence interval. C. With 98% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. D. It can be said that 98% of people have a commute…

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