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94•(-)(+)(++)(+++)012++3+++32103210tStata:genrank/#signtest/#signrank/#(Wilcoxon)ranksum/#(Wilcoxon-Mann-Whitney)wilcoxon/#(Wilcoxon)kwallis/#(Kruskal-Wallis)spearman/#(Spearman)ktau/#(Kendall)Statagenrank:genrankvar=original_vargenrank(original_var)(var)0-2-34?5470?0Stata•95Statasigntestsignrankttest:signtestvar=signtestvar1=var2signrankvar1=var2Wilcoxon1224(/)?:ABCDEFGHIJKL(x):767170618059746279728463(ax):936865659378837998789060(1)signtest:signtestxax0(Positive)0(Negative)0()P=0.1460(2)signrank:signrank76/:96•Stataranksumwilcoxon:ranksumvarby(group_var)wilcoxonvarby(group_var)group_varby()(g/100g)(a=1):56791213151821(a=2):17182025344344xa(1)ranksum:ranksumxgenranka=2:SumofRanks86.5(a2)Expectedsum59.50.05(2)wilcoxon:wilcoxonWilcoxon-Gehan()deadvarwilcoxonWilcoxon-Mann-WhitneyStatakwallis:kwallisvarby(group_var)KruskalWallisgroup_varby()8.4Stata•97(a=1)(a=2)(a=3)0.40.69.81.91.210.22.22.010.62.52.413.02.83.114.03.14.114.83.75.015.63.95.915.64.67.421.67.013.624.0……kwallisxgenrank_Ranksumχ20.05Stataspearmanktau:spearmanxyktauxySpearmanKendall10(y1/10)x10:3.71.01.70.74.05.15.55.75.910.0:46.518.914.421.527.364.646.334.277.655.1ρ98•ττspearmanktauKendallτbSpearmanρS8.4yryry:8.4()8.5xyrxryrxry:Stata•998.5xySpearmanrxryPearson()C(mg/100g)VC?ab=1b=2b=32(a=2)11.45.83.54(a=4)6.48.67.56(a=6)11.27.09.88(a=8)13.810.810.410(a=10)7.38.89.312(a=12)8.36.22.5xrankx:C()12AB(a)(stage)123456789101112IBBABAAAABBBA2310331424283188172618IIAABABBBBAAAB211128272012201311142613100•1.231212.102113.33321............24.131222xxrank:0.05AB