Assume the IQ scores in a population are normally distributed with a mean value of 100 and a standard deviation of 15. Compute the proportion of people in the population for each of the following ranges of IQ scores. The answer should include hand calculations of z-scores involved.a. less than 85b. higher than 118c. between 85 and 133d. between 97 and 115

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Assume the IQ scores in a population are normally distributed with a mean value of 100 and a standard deviation of 15. Compute the proportion of people in the population for each of the following ranges of IQ scores. The answer should include hand calculations of z-scores involved.
a. less than 85
b. higher than 118
c. between 85 and 133
d. between 97 and 115

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