[问答题]

查表求
(1)Z0.05;(2)Z0.96;(3)X20.025(15);(4)X20.975(15);
(5)X20.05(50);(6)X20.05(100);(7)t0.025(19);
(8)t0.025(99);(9) F0.05(2,6);(10) F0.01(3,40);
(11) F0.95(2,6);(12) F0.99(3,40)。

参考答案与解析: