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**Unformatted text preview: **IDS 301 Part 2 Chapters 10 through 14 Alpha is .05 if not stated in the problem. 1. The following information was gathered about accounting and engineering graduates GPA’s at SDSU. Accounting Engineering 95 . 15 . 3 38 1 1 1 = = = σ x n 95 . 15 . 3 38 2 2 2 = = = σ x n What is the point estimator? Construct a 90% confidence interval for the difference between GPA’s of the two majors. 2. The following information was given about present graduates with the following degrees: Accounting Engineering 800 , 7 $ 850 , 39 $ 57 1 1 1 = = = σ x n 100 , 5 $ 300 , 41 $ 41 2 2 2 = = = σ x n You would like to see if there is a difference between the starting salaries of these two majors. State the null and alternative hypothesis. What is the value of the test statistic? What is the p- value of the test statistic? What conclusion will you draw? 3. You would like to estimate the variance of sick days at a Fortune 500 company. You randomly select 15 employees and record how many sick days they have used in the past year...

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