P(T>t)=a 0. .3 -ta =t-a .25 0.2 n=10 0.15 0.1 l 0.05 . -la ta P(T>1.8125)=0.05→os(10)=1.8125 P(T<-1.8125)=0.05 P(T>-1.8125)=0.95 →to95(10)=-1.8125 -3 -2 -1 1 2 3 0.05 0.1 0.15 0.2 0.25 0.3 0.35 n = 10 ( ) α α α α − = − > = 1 t t P T t ( 1.8125) 0.05 (10) 1.8125 P T > = ⇒ t0.05 = tα -tα • • ( ) ( 1.8125) 0.95 1.8125 0.05 > − = < − = P T P T α (10) 1.8125 ⇒ t0.95 = −