In the next column are several sample means. For each class, calculate the differences between the means

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In the next column are several sample means. For each class, calculate the differences between the means for students who sit in the front versus the back of a classroom.


Students Students Mean in the Front Test Grades in the Back Class 1 82 78 Class 2 79.5 77.41 Class 3 71.5 76 Class 4 72


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