SOLUTION: Assume that adults have IQ scored that are normally distributed with a mean of 100 and a standard deviation of 15. Find the probabilty that a randomly selveted adult has an IQ betw
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Question 314863: Assume that adults have IQ scored that are normally distributed with a mean of 100 and a standard deviation of 15. Find the probabilty that a randomly selveted adult has an IQ between 81 and 119? I can't find thee formula on how to find the answer.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the z scores for both values.
.
.
.
Find the normal probability value for both of these z scores.
I used EXCEL's NORMDIST function(CUMULATIVE=TRUE).
The probability for the values to lie between 81 and 119 is the difference in probability values.
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