When conducting a t test for independent means:
A)you assume the medians of the two populations are equal
B)you reject the null hypothesis if the t score is more extreme than the cutoff t score
C)you should use only the .01 significance level because of the greater power compared to a t test for dependent means
D)all of the above

Question

Quizplus · Accepted Answer

Option A is incorrect because with a t test for independent means, you assume the means of the two populations are equal, not the medians. Option C is also incorrect because the choice of significance level depends on the research question and the level of certainty desired, not just on the type of t test being conducted. Option B is correct because in a t test for independent means, the null hypothesis is rejected if the calculated t score is more extreme (either higher or lower) than the critical value of t at the chosen significance level.

When Conducting a T Test for Independent Means