Question: A small fourth-grade class is randomly split into two groups. Each group is taught fractions using a different method. After three weeks, both groups are

A small fourth-grade class is randomly split into two groups. Each group is taught fractions using a different method. After three weeks, both groups are given the same 100-point test. The scores of students in the first group are 82, 86, 91, 72, and 68; the scores reported for the second group are 76, 63, 80, 72, and 67.

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