Refer to the following partial ANOVA results from Excel (some information is missing). Degrees of freedom for the F-test are:
A) 5,22.
B) 4,21.
C) 3,20.
D) impossible to determine.

Question

Refer to the following partial ANOVA results from Excel (some information is missing).  Degrees of freedom for the F-test are:
A) 5,22. 
B) 4,21. 
C) 3,20. 
D) impossible to determine.

Quizplus · Accepted Answer

The degrees of freedom for the F-test consist of two values: d.f. between and d.f. within. Based on the information given, we know that the d.f. within is 20 since the sample size minus the number of groups is 25 - 5 = 20. To find the d.f. between, we need to know the total number of groups minus one (in this case, we're missing that information) or the numerator d.f. If we assume that there are four groups (since there are often four conditions in a study), then the d.f. between would be 3. This gives us an F-test with d.f. between = 3 and d.f. within = 20, which corresponds to choice C.

Refer to the Following Partial ANOVA Results from Excel (Some