Mathematics, 08.04.2021 18:10 jadens25

IQ tests are designed to yield results that are approximately normally distributed. Researchers think that the population standard deviation is 15. A reporter is interested in estimating the average IQ of employees of a large high-tech firm in California. She gathers the IQ information on 22 employees and records the sample mean IQ at 106. Compute the 90% confidence intervals of the average IQ in this firm.

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IQ tests are designed to yield results that are approximately normally distributed. Researchers thin...