Mathematics, 26.12.2020 01:30 noaj94
While doing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. Her sample consisted of 20 students with a mean of $212.45 and a standard deviation of $38.92. A. Find the 99% confidence interval estimate of the true mean textbook cost for the semester based on her sample. Assume the cost of new textbooks is normally distributed. B. Based on part a, is an average cost of $200 for a semester a likely value for the population mean? Why or why not?
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