Mathematics, 26.07.2021 23:40, christine44gordon
researchers are studying the amount of sleep elderly americans are getting. they conduct a random sample of 3000 americans over 70 years og age the mean hours of sleep is 8.3 hours with a standard deviation of 1.2 hours. researchers want to find the 98% confidence interval. what is the sample mean? what is the sample size? what is the sample standard deviation? What is the stated goal of this question?
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