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...

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 = 2, n1 = 30, x2 = 18, s2 = 5, n2= 40

a. Right-tailed test, α = 0.05

b. 95% confidence interval