topic Re: Test of Significance for paired data in SAS Procedures

Test of Significance for paired data

GreggB — Thu, 12 Oct 2017 16:14:13 GMT

I have pre and post-test data that is expressed in percentiles. Is there a test of significance (maybe similar to McNemars) that would test to see if the gains (or losses) are significant at a certain confidence level? Essentially, did Instructor A's students make significant gains, significant losses, or neither?

instructorID studentID Pre Post

A 1 42 80

A 2 99 90

B 3 14 20

B 4 50 50

Re: Test of Significance for paired data

ballardw — Thu, 12 Oct 2017 16:22:53 GMT

I would start with something like which would require the data to be sorted by instructorid.

Proc ttest data=have;

by instructorid;

paired pre*post;

run;

Which will show summary of the differences between the variables for each instructor as well as a ttest for the difference being different from zero.

There are a number of options depending on specific questions.