Multiple Choice

President Martin was crowing about the incoming class of first-year students at Brand X University. “Last year the mean SAT score for first-year students was 1260,” he began, “and this year it’s risen to 1270! I think we can all be proud of that!” Although the scores from one year to the next are indeed different, why should no one get too excited?

A

President Martin forgot to mention that the median in the first group was 1200, and the mode in the second group was1300.

B

**Although there is a numerical difference between 1260 and 1270, there is unlikely to be a statistically significant difference between those two results; both groups are performing pretty much the same on the SAT.**

C

The standard deviations in both distributions were identical, and that’s what counts; inferential statistics compare one standard deviation to another.

D

President Martin forgot to describe the standard deviation; the formula “mean minus standard deviation” is what’s needed to compute inferential statistics.

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