Consider the following research question: Are customer complaint levels different this year than last year? This would be addressed with a ______.
A) two-tailed test
B) one-tailed test
C) both a and b
D) none of these

Question

Quizplus · Accepted Answer

A two-tailed test is appropriate because the research question is asking if there is a difference in complaint levels, which could be either an increase or a decrease, not specifying a direction.

Consider the Following Research Question: Are Customer Complaint Levels Different