12 May Show all of your work! 1. Assume that adults have credit scores
Show all of your work! 1. Assume that adults have credit scores with a mean of = 715 and a standard deviation of A simple random sample of 50 adults had been selected n=50 adults. Construct a 90% confidence interval estimate of the mean credit scores of all adults. 2. State true or false: The mean of a sampling distribution of sample means is equal to population mean. 3. Assume that adults have credit scores with a mean of = 715 and a standard deviation of A simple random sample of 20 adults had been selected n=20 adults. Construct a 99% confidence interval estimate of the mean credit scores of all adults. 4. A study of the number of hours worked by employees in various occupations each week resulted in a population mean of 45 hours and a standard deviation of 7 hours. If you were to take a sample of 225 individuals, what would you expect to be the mean and standard deviation of your sample?
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