Which of the following statements are true? Select one: a. In real problems, it

Question

Which of the following statements are true? Select one: a. In real problems, it is virtually always the case that the values of the population variances are unknown. b. The two-sample test is applicable in situations in which population distributions are both normal when population variances have unknown values, and at least one of the two sample sizes are small. C. The pooled t test procedure is applicable if the two population distribution curves are assumed normal with equal spreads. d. All of the above statements aretrue. e. None of the above statements are true

Explanation / Answer

All of the above statements are true.

(Because in most real life cases, values of population variances are unknown to us and pooled t test procedure assumes normality of the 2 population distribution curves.)

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