SELECT ALL THAT APPLY $d f_{b}=k-1$ Where K Is the Number of Samples

Multiple Choice

SELECT ALL THAT APPLY.
-Degrees of freedom:

A) $d f_{b}=k-1$ where k is the number of samples.
B) $d f_{w}=N-k$ where N is the Population size and k is the number of samples.
C) $d f_{b}=\frac{\text { SSB }}{\text { Meansquarebetween }}$ .
D) $d f_{w}=\frac{\text { SSW }}{\text { Mean.square.within }}$ .