7.15 Finding the critical value t*. What critical valuet* from Table D should be used to calculate the marginof error for a confidence interval for the mean of thepopulation in each of the following situations? (a) A 95% confidence interval based on n = 15 observations.(b) A 95% confidence interval from an SRS of28 observations.(c) A 90% confidence interval from a sample of size 28.(d) These cases illustrate how the size of the margin oferror depends upon the confidence level and the samplesize. Summarize these relationships.

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Answered: (a) A 95% confidence interval based on…

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) A 95% confidence interval based on n = 15 observations. (b) A 95% confidence interval from an SRS of observations. 28 (c) A 90% confidence interval from a sample of size 28.