(Choose 1 answer)
(See picture)
A. (-0.167, 2.567)
Β. (-2.157, 0.767)
C. (-0.167, 1.567)
D. (-1.167, 0.567)
Checking the lengths (cm) of randomly selected products from two manufacturing plants, we get the following data:
N1 26,X₁ = 6.9, S₁ = 1.26,n2 = 23,27.2, S2 = 1.76.
Assume that the variances are equal, construct a 95%confidence interval on the difference in population mean lengths.
Let t0.05.47 1.68; to.025.47 2.
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