What is the probability that the investment has a return of at least 20%? What is the probability that the investment has a return of 10% or less?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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mean of 10.1% and a population standard deviation of 5.4%.mean of 10.1% and a population standard deviation of 5.4%.

What is the probability that the investment has a return of at least 20%?

What is the probability that the investment has a return of 10% or less?

A person must score in the upper 5% of the population on an IQ test to qualify for a particular occupation.

If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what score must a person have to qualify for this occupation? 

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