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[问答] Is Wald Test a kind of Chi-Square test? [推广有奖]

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suzhzh 发表于 2015-2-10 16:13:13 |显示全部楼层 |坛友微信交流群

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Recently, I am studying the non-inferiority test based on the difference of two proportions. The teacher asked us to use Chi-square test do, but I used SAS, and found it use the Wald test do this by default, and can't set the method as Chi-square, hence I want to bring this out to seek: Is Wald Test a kind of Chi-square test?
The code is as below:
data pd1;
input grp $ response count;
datalines;
grp1 1 20
grp1 0 4
plcb 1 18
plcb 0 6
;
run;
/*Do non-inferiority test by Chi-square test*/
proc freq data=pd1;
tables grp*response/chisq alpha=0.025 riskdiff(column=2 noninf correct margin=0.3);/*noninf:non-inferiority test; margin: the margin want to detect*/
weight count;/*count: then number of responders*/
run;
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关键词:Square test Wald kind Est difference Recently default studying teacher

jingju11 发表于 2015-2-10 22:28:38 |显示全部楼层 |坛友微信交流群
Wald statistic may be approximated by Chisq-distribution. Jingju

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suzhzh 发表于 2015-2-10 22:37:22 |显示全部楼层 |坛友微信交流群
jingju11 发表于 2015-2-10 22:28
Wald statistic may be approximated by Chisq-distribution. Jingju
Thank you so much Jingju. I get that.

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