The Ratio Which Evaluates the Significance of an Extraneous Variable $\frac{M S T}{M S E}$

Multiple Choice

The ratio which evaluates the significance of an extraneous variable in an analysis of variance is

A) $\frac{M S T}{M S E}$ .
B) $\frac{M S(T r) }{M S E}$ .
C) $\frac{M S(T r) }{M S T}$ .
D) $\frac{M S B}{M S E}$ .