等效性为例,根据BES集(N1)算出GMR1,CV1,根据这三个参数可以算出事后Power,这个power和我们估算样本量的power0.8或0.9进行对比,当然>=事前规定的0.8或0.9最好。 根据GMR1,CV1,alpha=0.05,Beta=0.8或0.9,可以算出N2,当然N2<=N1最好。 Sas代码: 反推power pr...
"Proc Power in SAS 9.1"Debbie Bauer, MS, Sanofi-Synthelabo,Russell Lavery, Contractor, About Consulting, Chadds Ford, PA ABSTRACT Features were added to SAS? V9.1 STAT that will allow many users to do all their power and sample size calculations in SAS. Two free STAT Procs (Proc ...
compared with the formula results. Results In two sample means test, Stata and PASS had the most accurate results, the results in SAS were affected by different parameters. In two sample rates test, the SAS results were the best of three, the accuracy of PASS was related with the sample ...
Analysis of Maximum Likelihood Estimates 而对于泊松模型,则需要PROC GENMOD。我觉得我一一个列出这些模型已经超出了这篇笔记的范围了...所以干脆就改成简单翻译一下各个PROC的主要模型吧。说过了,学习模型不是 主要的目的——模型终究不该通过软件来学...虽然SAS的user guide真的还算是比较好的统计学教材呢。 SA...
SAS里面的概要统计:PROC MEANS 其实前几天也说过了PROC MEANS,不过这里稍稍补充一点置信区间的东西吧。其实它的参数真的挺多的: CLM:双侧置信区间 CSS:调整平方和 CV:变异系数 KURTOSIS:峰度 LCLM :单侧置信区间——左侧 MAX:最大值 MEAN:均值 MIN:最小值 ...
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然后,通过设置MEANS(两组样本均值)和ALPHA的值,来计算所需的样本量。 三、双样本比较方法: 双样本比较方法是用于比较两个独立样本所得的数据的差异性的一种方法。在SAS中,可以使用PROCPOWER来进行双样本比较方法的样本量计算。以下是一个简单的示例程序: PROCPOWER; TWOSAMPLETEST; MEAN1=10; MEAN2=12; STDDEV...
select count(distinct &subject.) into :count trimmed from _rungrpds; select ratio into :ratio trimmed from _temp_03; select CV01 into :cv trimmed from _temp_04; quit; ods output output=_temp_05; proc power; twosamplemeans test=equiv_ratio alpha = 0.05 lower = 0.8 upper = 1.25 mean...
*** ***/ proc power ; onewayanova groupmeans =11| 10| 9 stddev=2.71 alpha = 0.05 npergroup = . power = .9; run; 2.71=sqrt((3**2+3**2+2**2)/3) /*估计总体均数样本含量的计算/ %macroonesample_mean(alpha=,=,delta=) data d1_1;n=(probit((1-α2))*...
内容提示: 1 Paper 195-29 "Proc Power in SAS 9.1" Debbie Bauer, MS, Sanofi-Synthelabo, Russell Lavery, Contractor, About Consulting, Chadds Ford, PA ABSTRACT Features were added to SAS® V9.1 STAT that will allow many users to do all their power and sample size calculations in SAS. ...