20. Correct. The answer is true

 

(a)     v1 =15, v2=9, and F0.99, 15, 9 = 4.96

(b)    By Theorem 4-8, p.118, F0.01, 15, 9 = ( F0.99, 15, 9)-1 = 0.257

(c)     v1 =10, v2=15, and F0.95, 10, 9= 2.54

(d)    By Theorem 4-8, p.118 in Schaum's Outline, F0.05, 8, 30 = ( F0.05, 8, 30)-1 = 0.325