Compute the Critical Value for a Right-Tailed F -Test With a =

Multiple Choice

Compute the critical value for a right-tailed F -test with $a = 0.05 , \text { d.f.N. } = 21 , \text { and d.f.D. } = 20$

A) 2.12
B) 2.23
C) 2.20
D) 2.16