Monday, April 23, 2007

Consider Coming to the Exam Review

I just analyzed the mean exam scores between students who did and did not attend the in-class review session.

Average grade of those who attended: 74%
Average grade of those who did not: 62%

The difference is statistically significant, p = .005.

Obviously there are many confounds -- especially motivation -- but the difference is telling.

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2 Comments:

Anonymous Anonymous said...

Was this two-tailed or one-tailed with a directional hypothesis?

8:35 AM  
Anonymous Sam said...

It should have been one-tailed, in which case, p = .0025

2:33 PM  

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