In a test, students averaged 16.2 errors with a standard deviation of 4.2 errors. Say a random sample of 49 students is taken. You are told that errors are normally distributed. What is the probability that the mean error is greater than 15?

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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In a test, students averaged 16.2 errors with a standard deviation of 4.2 errors. Say a random sample of 49 students is taken. You are told that errors are normally distributed. What is the probability that the mean error is greater than 15?

 

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