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Intelligence (as measured by IQ) in the population is normally distributed with a mean of 100 and a standard deviation of 15. If a person

Intelligence (as measured by IQ) in the population is normally distributed with a mean of 100 and a standard deviation of 15. If a person tells you they have an IQ of 91, what is their z-score? Intelligence (as measured by IQ) in the population is normally distributed with a mean of 100 and a standard deviation of 15. If a person tells you they have an IQ of 91, what is their z-score

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