A researcher calculates an F-ratio comparing the GPAs of three different SJSU majors: Major A (M = 2.40), Major B (M = 2.16) and Major C (M = 3.05). If she makes the decision to reject the null hypothesis, what is the most specific and appropriate conclusion she can draw?
A) GPAs vary as a function of major.
B) The GPAs for the three majors are not different from each other.
C) The GPAs for the three majors are all different from each other.
D) The analysis supports the research hypothesis.

Question

Quizplus · Accepted Answer

The decision to reject the null hypothesis indicates that there is a significant difference between the GPAs of the three majors. However, it does not provide information on which specific majors have significantly different GPAs. Therefore, the most specific and appropriate conclusion would be that GPAs vary as a function of major.

A Researcher Calculates an F-Ratio Comparing the GPAs of Three