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 15.
B)The populations are both dramatically negatively skewed.
C)The populations are both dramatically positively skewed.
D)The populations are dramatically skewed in opposite directions.

Question

Quizplus · Accepted Answer

The t test assumes that the population distributions of the two groups are approximately normal and have similar variances. However, if the populations are dramatically skewed in opposite directions, it violates the assumption of normality and may affect the validity of the t test. This is considered the most serious violation among the options given.

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