In a one-tailed hypothesis test in which the null hypothesis is $\mu$₁ $\mu$₂, sample sizes were 12 for sample 1 and 16 for sample 2.Which of the following statements is true? A)If the two populations are normal, with equal standard deviations, we can pool sample standard deviations to estimate the common population standard deviation. B)We could use the t distribution with df = 28 to conduct the test. C)The sample mean difference can only be approximated. D)The p-value for the sample mean difference would necessarily be less than$\alpha$.

Question

In a one-tailed hypothesis test in which the null hypothesis is $\mu$₁ >$\mu$₂, sample sizes were 12 for sample 1 and 16 for sample 2.Which of the following statements is true? A)If the two populations are normal, with equal standard deviations, we can pool sample standard deviations to estimate the common population standard deviation. B)We could use the t distribution with df = 28 to conduct the test. C)The sample mean difference can only be approximated. D)The p-value for the sample mean difference would necessarily be less than$\alpha$.

Quizplus · Accepted Answer

When the two populations are normal and have equal standard deviations, we can pool the sample standard deviations to estimate the common population standard deviation.

In a One-Tailed Hypothesis Test in Which the Null Hypothesis μ\muμ

In a One-Tailed Hypothesis Test in Which the Null Hypothesis $\mu$