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A researcher wants to know whether students who attend college tend to have higher IQ scores than people in the average population. The mean IQ

A researcher wants to know whether students who attend college tend to have higher IQ scores than people in the average population. The mean IQ in the population is 100, with a standard deviation of 15. The researcher collects a sample of 20 college students and finds a sample mean IQ of 113. Calculate the z-test statistic

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