Several years ago, the mean height of women 20 years of age or older was 63.7 inches. Suppose that a random sample of 45 women who are 20 years of age orolder today results in a mean height of 64.4 inches.(a) State the appropriate null and alternative hypotheses to assess whether women are taller today.(b) Suppose the P-value for this test is 0.17. Explain what this value represents.(c) Write a conclusion for this hypothesis test assuming an a = 0.10 level of significance.(a) State the appropriate null and alternative hypotheses to assess whether women are taller today.O A. Ho: H = 63.7 in. versus H,: µ # 63.7 in.O B. Ho: H = 64.4 in. versus H,: µ # 64.4 in.O C. Ho: H = 63.7 in. versus H,: µ< 63.7 in.D. Ho: H = 63.7 in. versus H,: µ > 63.7 in.O E. Ho: µ = 64.4 in. versus H;: µ > 64.4 in.O F. Ho: H = 64.4 in. versus H,: µ< 64.4 in.

Given : Several years ago, the mean height of women 20 years of age or older was 63.7 inches.

Answered: Several years ago, the mean height of…

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A somewhat outdated study indicates that the mean number of hours worked per week by software developers is 44. We have good reason to suspect that the mean number of hours worked per week by software developers, μ, is now greater than 44 and wish to do a statistical test. We select a random sample of software developers and find that the mean of the sample is 48 hours and that the standard deviation is 6 hours. Based on this information, complete the parts below. (a) What are the null hypothesis H0 and the alternative hypothesis H1 that should be used for the test? (b) Suppose that we decide to reject the null hypothesis. What sort of error might we be making? (c) Suppose the true mean number of hours worked by software engineers is 50 hours. A Type II error would be _____ the hypothesis that μ is_____ when, in fact, μ is_____ .
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