4.1.2标准正态分布:对于一般正态分布p58 1=2 (a) (c) Fig 4-2 (a)Different means, same variance; (b same mean, different 4-6 variances;(c)different means, different variances
4-6 4.1.2 标准正态分布：对于一般正态分布p58 Fig 4-2 (a) Different means, same variance; (b) same mean, different variances; (c) different means, different variances
41.2标准正态分布p58-60 P(-1.67sZ≤167)=0.905 0.0475 0.0475 1.67 1.67 F(Z) P(Zs1.67)=0.9525 16723 4-7 Fig 4-3 (a)PDF and (b )CDF of the standard normal variable
4-7 4.1.2 标准正态分布p58-60 Fig 4-3 (a) PDF and (b) CDF of the standard normal variable
4.1.3从正态总体中随机抽样p60 Table 4-1 25 Random numbers from N(o, 1)and N(2, 4)by software N(O,1) N(2,4) N(0,1) N2,4) 0.48524 4.25181 0.22968 021487 0.46262 0.01395 -0.00719 047726 223092 0.09037 0.71217 1.32007 023644 1.96909 -0.53126 1.25406 1.10679 1.62206 -1.02664 3.09222 0.82070 1.17653 1.29535 1.05375 0.86553 278722 -0.61502 0.58124 0.40199 241138 1.80753 155853 1.13667 2.58235 0.20687 1.71083 -2.05585 0.40786 -0.19653 090193 298962 0.24596 249463 0.14726 0.61674 -3.45379 0.94602 3.69238 032833 3.29003 4-8
4-8 4.1.3 从正态总体中随机抽样p60 Table 4-1 25 Random numbers from N(0, 1) and N(2, 4) by software