A university wants to determine the population average grade of all students who take a statistics class online. The grade distribution of online statistics classes is normal. The average grade of 20 online statistics classes is 60% with a standard deviation of 15%. Find a 95% confidence interval for the average grade of all online statistics classes.

A university wants to determine the population average grade of all students who take a statistics class online. The grade distribution of online statistics classes is normal. The average grade of 20 online statistics classes is 60% with a standard deviation of 15%. Find a 95% confidence interval for the average grade of all online statistics classes.

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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