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Problem #7: IQs are known to be normally distributed with mean 100 and standard deviation 15. (a) What percentage of people have an IQ lower

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Problem #7: IQs are known to be normally distributed with mean 100 and standard deviation 15. (a) What percentage of people have an IQ lower than 88? (b) Fill in the blank. 75% of the population have an IQ that is greater than r as a percentage, correct to 2 decimals, Problem #7(a): Problem #7(b): |:| answer correct to 2 decimals

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