SOLUTION: The IQ scores of adults are normally distributed with a mean of 100 and a standard deviation of 15. If a group of 64 adults is randomly selected what is the probability that their

Question 932580: The IQ scores of adults are normally distributed with a mean of 100 and a standard deviation of 15. If a group of 64 adults is randomly selected what is the probability that their mean IQ will be at least 95?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
mean of 100 and a standard deviation of 15
sample n = 64

....
P(phat ≥ 95) = P(z > -5/1.875) = normalcdf(-2.6667, 100) = .9962 0r 99.62%

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