Posted by **sarah** on Tuesday, October 16, 2012 at 8:12pm.

A group of 200 students takes the Kaplan course in hopes that it will improve their SAT scores above the national mean of 500 on the math section. The population standard deviation of the SAT is known to be 100. Use an alpha level of .05 when answering the following questions. Compute the one-sample z-test statistic.

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