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Hypothesis Testing 3. The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for...
Hypothesis Testing3. The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for the students each semester. A sample of 45 students enrolled in the university indicates that X (bar) = $285.4 and s = $42.20.a. Using the 0.05 level of significance, is there evidence that the population mean is above $300?b. What is your answer in (a) if s = $90 and the 0.10 level of significance is used?c. What is your answer in (a) if X (bar) = $310.10 and s = $40.20?d. Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
3. The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for the students each semester. A sample of 45 students enrolled in the...