In each of Exercises we have provided summary statistics for independent simple random samples from two populations. In each case, use the pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval. x1 = 20, s1 = 4, n1 = 10, x2 = 23, s2 = 5, n2 = 15 a. Left-tailed test, a = 0.05 b. 90% confidence intervalv

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In each of Exercises we have provided summary statistics for independent simple random samples from two populations. In each case, use the pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval.

x1 = 20, s1 = 4, n1 = 10, x2 = 23, s2 = 5, n2 = 15

a. Left-tailed test, a = 0.05

b. 90% confidence intervalv

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