S2/6 (2)F F(9,7) S2/4 S,2/628.28/62 8,28= S,/4 1/4 =P(F<3.68)=1-P(F≥368)=1-0.05=0.958 (2) ~ (9,7) 4 6 2 2 2 2 2 1 F S S F 8.28 2 2 2 1 S S P 2 2 2 2 2 2 2 1 1/ 4 8.28 / 6 / 4 / 6 S S P P(F 3.68) 1 P(F 3.68) 1 0.05 0.95