From a random sample of 72 students, a university Dean of students wishes to estimate the average number of hours students spend on homework weekly. The standard deviation from a prior study is 6.2 hours. How many more students must the Dean select if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1.5 hours.

From a random sample of 72 students, a university Dean of students wishes to estimate the average number of hours students spend on homework weekly. The standard deviation from a prior study is 6.2 hours. How many more students must the Dean select if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1.5 hours.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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