SOLUTION: Qs are normally distributed with a mean of 100 and a standard deviation of 15.If an individual is randomly selected, find the probability that his or her IQ is below 70.
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Question 1060345: Qs are normally distributed with a mean of 100 and a standard deviation of 15.If an individual is randomly selected, find the probability that his or her IQ is below 70.
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
calculate the z-score associated with IQ 70
:
z-score = (70 - 100) / 15 = -2
:
lookup z-score in the table of z-scores
:
Probability ( X < 70 ) = 0.0228
:
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