Provided below are summary statistics for independent simple random samples from two populations. 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=12​, x2=18​, s2=5​, n2=13   a.​ Right-tailed test, α=0.05 b. 90​% confidence interval   a. What are the correct hypotheses for a​ right-tailed test?   A. H0​: μ1=μ2 Ha​: μ1≠μ2   B. H0​: μ1<μ2 Ha​: μ1=μ2

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