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A statistics teacher wants to see if there is any difference in the abilities of students...

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Basic Math

A statistics teacher wants to see if there is any difference inthe abilities of students enrolled in statistics today and thoseenrolled five years ago. A sample of final examination scores fromstudents enrolled today and from students enrolled five years agowas taken. You are given the following information.

today (population 1) Five years ago (population 2)

sample mean 86 88

sample variance 112.5 54

sample size 45 36

The 92.50% confidence interval for the difference between thetwo population means is (round your answer to 2 decimalplaces).

Answer & Explanation Solved by verified expert
3.9 Ratings (467 Votes)
n1 45 86s12 1125n2 36 88s22 54Claim There is difference in the abilities of students enrolledin statistics today and those enrolled five years agoThe null and alternative    See Answer
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