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July 5, 2015

Homework Help: stats

Posted by kelly on Tuesday, February 5, 2013 at 9:21pm.

Relatively speaking, which statistics exam did you do better on? On your first statistics exam you scored a 72 and on the second exam you scored an 89. Hey, youíre improving! Or are you? On the first exam, the class mean was 71 with a standard deviation of 15. On the second exam the class mean was 95 with a standard deviation of 5. Convert your scores into z scores and determine whether your grade improved over the course of the semester relative to the other students in the class.

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