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IQ scores in the population have a mean of 100 and a standard deviation of 15. If Bob has an IQ of 83, what percent

IQ scores in the population have a mean of 100 and a standard deviation of 15.

If Bob has an IQ of 83, what percent of people have scores lower than him?

If Sally has an IQ of 97, what percent of people have scores higher than her?

What percent of people haveIQsbetween 80 and 120?

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