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1. IQ tests are normally distributed with a mean of 100 and a standard deviation of...

1. IQ tests are normally distributed with a mean of 100 and a standard deviation of 15. Find the following probabilities:

A) If a person is randomly selected, what is the probability that the person had an IQ greater than125? _________________

b) If a person is randomly selected what is the probability that the person has an IQ below 92?

c) If 40 people are randomly selected, what is the probability that their mean IQ is between 98 and 108?

Math   Statistics-And-Probability   
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