SOLUTION: B)If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. - Is it unusual to get a mean IQ score that is less then 97, if 16 IQ scores are rando

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Question 430252: B)If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
- Is it unusual to get a mean IQ score that is less then 97, if 16 IQ scores are randomly selected?. Explain please.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

P(<97)  then z = -3/15 = -.2 and P(z = -.2) = .4207 or 42% generally are <97

 .42*16 = 6  Not unusual