## Test of Significance for paired data

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# Test of Significance for paired data

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

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‎10-13-2017 07:33 AM
Super User
Posts: 12,148

## Re: Test of Significance for paired data

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.

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Solution
‎10-13-2017 07:33 AM
Super User
Posts: 12,148

## Re: Test of Significance for paired data

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.

☑ This topic is solved.