A study reports the F-ratio F(3,24) = 3.91. The TOTAL sample size (combining the different groups) is ______.
A) 24
B) 25
C) 27
D) 28

Question

Quizplus · Accepted Answer

The F-ratio notation F(3,24) indicates that there are 3 degrees of freedom for the numerator (which corresponds to the number of groups minus one) and 24 degrees of freedom for the denominator (which corresponds to the total sample size minus the number of groups). Therefore, the total sample size is 24 (degrees of freedom for the denominator) + 3 (number of groups) + 1 = 28.

A Study Reports the F-Ratio F(3,24) = 3