Suppose that simple random samples of college
Question # 00498339
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Updated on: 03/10/2017 02:22 AM Due on: 03/10/2017
Suppose that simple random samples of college freshman are selected from two universities - 25 students from school A and 20 students from school B. On a standardized test, the sample from school A has an average score of 990 with a standard deviation of 100. The sample from school B has an average score of 950 with a standard deviation of 90. What is the 95% confidence interval for the difference in test scores at the two schools, assuming that test scores came from normal distributions in both schools?
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Solution: Suppose that simple random samples of college