Question

Suppose that IQ scores are normally distributed with a mean of 100 and a standard deviation of 16.
a. What is the probability that a randomly selected person will have an IQ score of less than 90?
b. What is the probability that the average IQ score of four randomly selected people is less than 90?
c. If four people are randomly selected, what is the probability that all of them have an IQ score of less than 90?



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  • CreatedJanuary 28, 2015
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