Question: Construct a 95% confidence interval to estimate 1 - 2 by using the following data. Assume the populations are normally distributed. Sample 1 .. Sample

Construct a 95% confidence interval to estimate µ1 - µ2 by using the following data. Assume the populations are normally distributed.

Sample 1 .. Sample 2
x̄1 = 74.6 .... x̄2 = 70.9
s21 = 10.5 ... s22 = 11.4
n1 = 18 .... n2 = 19

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