Bao conducts a research study on a random sample of 60Harvard undergraduate students to determine the averagenumber of books that they purchase for the 2021-2022 academicyear. Based on surveys that were administered in prior years,Bao believes that the standard deviation of books in thepopulation of all Harvard undergrads is 7.a) Assuming that Bao's belief is correct, what is the standarderror of ?b) What is the minimum number of Harvard undergraduatestudents that Bao needs to survey to reduce the standarderror by 50%?

Standard error measures the accuracy of any estimation.

Answered: Bao conducts a research study on a…

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 professor believes the class he is teaching in the current semester is below the average of the classes he has taught. In order to test this hypothesis, he analyses the scores of midterm of all 100 students he teaches this semester. Their average score of this exam is 79 out of 100, with a standard deviation of 12. The mean score of the midterm for all students that he has taught for the last thirty-two years is 83 out of 100, with a standard deviation of 14. Use an alpha level of 0.01 for this analysis. Part C. Find the critical value:

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