7. Inference for Quantitative Data(COLON) Means

Carrying Out A Test For The Difference Of Two Population Means — Quiz

Test your understanding of carrying out a test for the difference of two population means with 5 practice questions.

Practice Questions

Question 1

What is the null hypothesis for a test about the difference of two population means when the claim is that there is no difference between the means?

Question 2

Which of the following is the correct alternative hypothesis for a two-sided test about whether two population means are different?

Question 3

In a two-sample $t$ test for $\mu_1 - \mu_2$, which formula is used for the test statistic?

Question 4

Which condition helps justify using a two-sample $t$ procedure for comparing two means?

Question 5

A researcher tests $H_0: \mu_1 - \mu_2 = 0$ versus $H_a: \mu_1 - \mu_2 > 0$ and gets a very small $P$-value. What is the best conclusion?