In a right-tailed test comparing two means with known variances, the sample sizes were n₁ = 8 and n₂ = 12. At α = .05, the critical value would be: A)1.960 B)1.645 C)1.734 D)1.282

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In a right-tailed test, the critical value for α = .05 is typically found using the standard normal (Z) distribution. The choice of critical value does not directly depend on the sample sizes but on the significance level and the nature of the test (right-tailed in this case). For a right-tailed test at α = .05, the critical value from the Z distribution is 1.645.

In a Right-Tailed Test Comparing Two Means with Known Variances