Question: Independent random samples selected from two normal populations produced the following sample means and standard deviations: Sample 1 ....Sample 2 n1 = 17 ...... n2

Independent random samples selected from two normal populations produced the following sample means and standard deviations:

Sample 1 ....Sample 2

n1 = 17 ...... n2 = 12

x̄1 = 5.4 ......x̄2 = 7.9

s1 = 3.4 .....s2 = 4.8

a. Assuming equal variances, conduct the test H0: (µ1 - µ2) = 0 against Ha: (µ1 - µ2) = 0 using α = .05.

b. Find and interpret the 95% confidence interval for (µ1 - µ2).

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