Fit Family Task Force Project - Rockford Public Schools

Pre and post test results, Montessori School 24
As the graph above shows, students in each of the five classes taking the pre and
post tests showed great improvement from their baseline knowledge. For the
school as a whole, 72 students were tested and the results were as follows:
School Average (Pre): 16.25
School Average (Post): 19.40
Difference: 3.15
Furthermore, a two tailed, paired t-test was completed for each of the classes and
the whole school and the resulting p-values were as follows:
TTEST P Value
Class 1 0.002883285
Class 2 0.003692672
Class 3 0.000154783
Class 4 0.000684114
Class 5 0.001810826
Total 1.10664E-12
With the p-values being so low, the null hypothesis of the difference of the
means between the pre and post test groups being zero can be rejected, and there
is clearly a statistical improvement between student’s pre and post test scores.
24 Data analysis, Prateek Sanan, University of Northern Illinois Medical School, Rockford, 2008