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Math- Prob Stat

The amount of time a student spends completing homework per week their senior year is normally distributed with a mean of 5 hours and a standard deviation of 1.4

A. Find the probability a randomly selected student spends less than 3 hours completing homework

B. Find the probability a randomly selected student spends more than 7 hours completing homework

C. Find the probability a randomly selected student spends between 4 and 6 hours completing homework

D. Find the amount of time a student spends on homework if their time creates the 15th percentile

E. Find the amount of time a students spends on homework if they are in the top 10% of all students

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  1. The absolutely perfect webpage for your question.
    Just plug in the values

    http://davidmlane.com/normal.html

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