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t-tests are used to determine whether two samples are different. For example, two sixth grade classes (random samples) took the same reading pre and post tests. The T-Test will help us analyze whether the two means are different. This means we are comparing the mean of fifth grade class one to fifth grade class two to see how they vary. This will help to figure out if students are increasing performance overall or not. Also, the t-test will help us figure out if we need to investigate further if there is significant differences in performance (intervention, supplemental materials, delivery method of instruction, etc).

• • Contributed by Tania Nicole Sutherland **