SOLUTION: IQ scores are normally distributed with a mean of 100 and a standard deviation of 12. Based on this distribution, determine:
a. The percent of IQ between 105 and 125.
b. Probabil
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-> SOLUTION: IQ scores are normally distributed with a mean of 100 and a standard deviation of 12. Based on this distribution, determine:
a. The percent of IQ between 105 and 125.
b. Probabil
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Question 1009739: IQ scores are normally distributed with a mean of 100 and a standard deviation of 12. Based on this distribution, determine:
a. The percent of IQ between 105 and 125.
b. Probability of selecting a person at random with IQ between 85 and 115.
c. Percent of scores between 100 and 130.
d. Percentile rank of IQ 145.
e. Percentile rank of IQ 90. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=(x-mu)/sigma
a. Percent between z=0.417 and z=2.167=0.3233
b.This is z between -1.25 and +1.25 or 0.7887
c.This is z between 0 and 2.5 or 0.4938
d. This is 99.99% ile
e. This is 20.2% ile
