Question: One semester, an instructor taught the same computer course at two universities located in different cities. He was able to give the same final at

One semester, an instructor taught the same computer course at two universities located in different cities. He was able to give the same final at both locations. The student's scores provided the summary statistics.

Sample 1 n1 25 81 = 144 Sample 2 12 y =

(a) Obtain a point estimate of μ₁- μ₂.
(b) Estimate the S.E. (x̅ - Y̅).
(c) Construct a 95% confidence interval for μ₁ - μ₂ .

Sample 1 n1 25 81 = 144 Sample 2 12 y = 40 74 157

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