Suppose you want to test the claim that μ1≠μ2. Two samples are randomly selected from each population. The sample statistics are given below. At a level of significance of α=​0.05, when should you reject H0​? n1=​50, n2=​60, x1=20​, x2=18​, σ1=​1.5, σ2=1.9   A. Reject H0 if the standardized test statistic is less than −1.645 or greater than 1.645.   B. Reject H0 if the standardized test statistic is less than −2.33 or greater than 2.33.   C. Reject H0 if the standardized test statistic is less than −1.96 or greater than 1.96.   D. Reject H0 if the standardized test statistic is less than −2.575 or greater than 2.575.

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