Assume that the amount of time, in hours, that college students spend per week on homework is normally distributed with a mean of 15 hours and a standard deviation of 3 hours. If 75 students are selected at random, what is the probability that they average: more than 14 hours per week on homework between 14 and 16 hours per week on homework less than 15.5 hours of homework per week Answer in complete sentences. Be sure to include all relevant calculations.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Assume that the amount of time, in hours, that college students spend per week on homework is normally distributed with a mean of 15 hours and a standard deviation of 3 hours.

If 75 students are selected at random, what is the probability that they average:

more than 14 hours per week on homework
between 14 and 16 hours per week on homework
less than 15.5 hours of homework per week
Answer in complete sentences. Be sure to include all relevant calculations. 

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