topic Re: How to find 95% confidence intervals in New SAS User

How to find 95% confidence intervals

GS2 — Fri, 13 Mar 2020 16:28:42 GMT

Using SAS 9.4

I am running the following code:

proc univariate data= have normal plots;
class graft;
var age_sx bmi_sx ;
run;

proc npar1way data= have wilcoxon;
class graft;
var age_sx ;
OUTPUT OUT= KW_PVALS (KEEP=_VAR_ P_KW);
RUN;
PROC PRINT DATA = KW_PVALS;
run;

ai would like to present the 95% CI along with the p-value. Is there a good method for producing that from the code I already have? Thank you

Re: How to find 95% confidence intervals

Reeza — Fri, 13 Mar 2020 16:46:59 GMT

Did you check the options on the OUTPUT statement? That' would be the start, especially since you're only keeping a single value you're dropping the rest which likely has what you want.

Re: How to find 95% confidence intervals

ballardw — Fri, 13 Mar 2020 16:50:32 GMT

Confidence interval of what? In which data set?

Re: How to find 95% confidence intervals

GS2 — Fri, 13 Mar 2020 19:13:55 GMT

I need to confidence interval of the median as my data is not normally distributed. CIbasic in the proc univariate would work except that statements assumes the normality of the data

Re: How to find 95% confidence intervals

Reeza — Fri, 13 Mar 2020 19:20:41 GMT

You don't usually calculate parametric statistics on a non-parametric measure such as the median. Usually with the median you report the quartiles as well, Q25 and Q75.