SOLUTION: Adult IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
find the percentage of adults who have an IQ between 70 and 130 and have and Iq over 1
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-> SOLUTION: Adult IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
find the percentage of adults who have an IQ between 70 and 130 and have and Iq over 1
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Question 1079517: Adult IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
find the percentage of adults who have an IQ between 70 and 130 and have and Iq over 130 Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Z=(x-mean)/sd
(130-100)/15=2 and (70-100)/15=-2
Probability of z between + and -2 is 0.9544
Probability of z>2 or IQ >130 is 0.0228. From table or calculator.
