SOLUTION: Consider the intelligence Quotient (i.Q.)scores for people. IQs are normally distributed with a mean of 100 and a Standard deviation of 16. If a person is picked at random, find th

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Question 871654: Consider the intelligence Quotient (i.Q.)scores for people. IQs are normally distributed with a mean of 100 and a Standard deviation of 16. If a person is picked at random, find the
a) probability that his/her score is greater than 90
b) thirty-third(33rd) percentile
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!


Hi

P(x > 90) = P(z > -10/16) = 73.40%

invNorm(.33)= -.44

-.44*16 + 100 = X =  -7.04 + 100 = 93 

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