Multiple choices 19/50
(Choose 1 answer)
(See picture)
A. 1.976
B. 0.987
C. 1.734
Next
D. 0.673
Checking the lengths (cm) of randomly selected products from two manufacturing plants, we get the following data:
n₁ = 26,₁ = 6.9, s₁ = 1.26,n2 = 23, x2 = 7.2, S2 = 1.76.
Assume that the variances are equal, what is the width of the 95% confidence interval on the difference in population mean lengths?
Let t0.05.47 1.68; 0.025,47 = 2.
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