The principal at a large high school claims that students spend at least 10 hours per week doing homework, on average. To investigate this claim, an AP Statisticsclass selected a random sample of 250 students from their school and asked them how long they spent doing homework during the last week. The sample mean was10.2 hours and the sample standard deviation was 4.2 hours. Construct and interpret a 95% confidence interval for the mean time that students at this school spentdoing homework in the last week. Based on your interval, what can you conclude about the principal's claim?What is your t* value? Remember to use the conservative DF value.

Given that, The sample size is 250 n=250 The sample mean x¯=10.2 The sample standard deviation s=4.2…

Answered: The principal at a large high school…

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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Arbitron Media Research Inc. conducted a study of the iPod listening habits of men and women. One facet of the study involved the mean listening time. It was discovered that the mean listening time for a sample of 8 men was 34 minutes per day. The standard deviation was 19 minutes per day. The mean listening time for a sample of 10 women was also 34 minutes, but the standard deviation of the sample was 7 minutes. At the 0.02 significance level, can we conclude that there is a difference in the variation in the listening times for men and women? (Round your answer to 3 decimal places.) The test statistic is .Decision: H0:σ21=σ22.

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