ch6-58 C P(T>ta2)= p(T >tan)=a a2 a/2 /2 P(T>22281)=0.025 P(7>22281)=0.05 to05(10)=22281ch6-58 ( )      =  = / 2 / 2 2 ( ) P T t P T t -3 -2 -1 1 2 3 0.05 0.1 0.15 0.2 0.25 0.3 0.35 t/2 -t/2 • • ( ) ( ) (10) 2.2281 2.2281 0.05 2.2281 0.025  0.025 =  =  = t P T P T /2 /2