Which of the following is the MOST serious violation of an assumption for the t test for independent means?
A)The sample size is smaller than 20.
B)The populations are both negatively skewed.
C)The populations are both positively skewed.
D)The populations are dramatically skewed in opposite directions.

Question

Quizplus · Accepted Answer

The assumption for the t test for independent means is that the population distributions are approximately normal. If the populations are dramatically skewed in opposite directions, this assumption is violated to the greatest extent and the t test results may not be reliable.

Which of the Following Is the MOST Serious Violation of an Assumption