《非参数统计》与MATLAB编程第五章两样本问题.docVIP

第五章 两样本问题 §5.1 a=[hygepdf(0,22,11,12) hygepdf(1,22,11,12) hygepdf(2,22,11,12) hygepdf(3,22,11,12)] a = 0 0.00001701085292 0.00093559691083 0.01403395366244 sum(a) ans = 0.01498656142619 hygecdf(3,22,11,12) ans = 0.01498656142619 ?.2.5h P72 x1=[20.6 19.9 18.6 18.9 18.8 20.2 21 20.5 19.8 19.8 19.2 20.5]; x2=[21.3 17.6 17.4 18.5 19.7 21.1 17.3 18.8 17.8 16.9 18 20.1]; format long [p,h,stats]=ranksum(x1,x2) p = 0.04317169310436 h = 1 stats = zval: 2.02204509752701 ranksum: 1.855000000000000e+002 zval的算法： n=12;m=12;N=24;me=n*(N+1)/2,de=n*m*(N+1)/12-n*m*3*(2^3-2)/(12*N*(N-1)) me = 150 de = 2.996086956521739e+002 z=(185.5-me-0.5)/sqrt(de) z = 2.02204509752701 P值的计算： p=2*(1-normcdf(z)) p = 0.04317169310436 精算算法： [p,h,stats]=ranksum(x1,x2,alpha,0.05,method,exact) p = 0.04004280818118 h = 1 stats = ranksum: 1.855000000000000e+002 习题五 1. 女职工 男职工 28500 30650 39700 33700 31000 35050 33250 36300 22800 35600 31800 37250 32350 26900 38200 33950 30450 31350 30800 37750 38200 28950 32250 36700 34100 32900 38050 36100 30150 31300 34800 26550 33550 31350 32750 39200 27350 35700 38800 41000 25200 35900 29900 40400 32050 35200 37400 35500 26550 30450 　 　 x =[ 28500 31000 22800 32350 30450 38200 34100 30150 33550 27350 25200 32050 26550 30650 35050 35600 26900 31350 28950 32900 31300 31350 35700 35900 35200 30450] y =[ 39700 33250 31800 38200 30800 32250 38050 34800 32750 38800 29900 37400 33700 36300 37250 33950 37750 36700 36100 26550 39200 41000 40400 35500] ①me=median([x;y]) me = 33400 [length(find(xme)) length(find(xme));length(find(yme)) le