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weekdays. He takes a random sample of 150 Americans and computes the average sleep time of 6.7 hours on weekdays. Assume that the population is

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weekdays. He takes a random sample of 150 Americans and computes the average sleep time of 6.7 hours on weekdays. Assume that the population is normally distributed with a known standard deviation of 2.1 hours. Use Table 1. a. Select the relevant null and the alternative hypotheses. H0:u=7;HA:|.l:t7 H0:p.27;HA:|.l

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