x1 = 20, s1 = 6, n1 = 20, . x2 = 24, s2 = 2, n2
Question:
a. Left-tailed test, α = 0.05
b. 90% confidence interval
We have provided summary statistics for independent simple random samples from two populations. In each case, use the nonpooled t-test and the nonpooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval.
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