A published report of a repeatedmeasures research study incl

A published report of a repeated-measures research study includes the following description of the statistical analysis. “The results show significant differences among the treatment conditions, F(2,20) = 5.00, p< .05.”

            a.         How many treatment conditions were compared in the study?

            b.         How many individuals participated in the study?

Solution

a) df1 = 2 => there were 3 groups

b) participants = n = df1 + df2 + 1 = 2+20+1 = 23