§7.5正态总体均值和方差的区间估计 x分布表 =0.995 0.99 0.975 0.95 0.90 0.75 0.001 0.004 0.016 0.102 2 0.010 0.020 0.051 0.103 0.211 0.575 0.072 0.115 0.216 0.352 0.584 1.213 0.207 0.297 0.484 0.711 1.064 1.923 夕 0.412 0.554 0.831 1.145 1.610 2.675 6 0.676 0.872 1.237 1.635 2.204 3.455 0.989 1.239 1.690 2.167 2.833 4.255 8 1.344 1.646 2.180 2.733 3.490 5.071 9 1.735 2.088 2.700 3.325 4.168 5.899 10 3.247 3.940 4.865 6.737 11 6.262 3.816 4.575 5.578 7.584 12 4.404 5.226 6.304 8.438 13 5.009 5.892 7.042 9.299 14 4.075 4.660 5.629 6.571 7.790 10.165 15 4.601 5.229 6.262 7.261 8.547 11.037 16 5.142 5.812 6.908 7.962 9.312 11.912 27/48 =0.995 0.99 0.975 0.95 0.90 0.75 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0.010 0.072 0.207 0.412 0.676 0.989 1.344 1.735 2.156 2.603 3.074 3.565 4.075 4.601 5.142 0.020 0.115 0.297 0.554 0.872 1.239 1.646 2.088 2.558 3.053 3.571 4.107 4.660 5.229 5.812 0.001 0.051 0.216 0.484 0.831 1.237 1.690 2.180 2.700 3.247 3.816 4.404 5.009 5.629 6.262 6.908 0.004 0.103 0.352 0.711 1.145 1.635 2.167 2.733 3.325 3.940 4.575 5.226 5.892 6.571 7.261 7.962 0.016 0.211 0.584 1.064 1.610 2.204 2.833 3.490 4.168 4.865 5.578 6.304 7.042 7.790 8.547 9.312 0.102 0.575 1.213 1.923 2.675 3.455 4.255 5.071 5.899 6.737 7.584 8.438 9.299 10.165 11.037 11.912 n    2  分布表 6.262 §7.5 正态总体均值和方差的区间估计 27/48