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On a certain exam, the average of the scores was 50 and the SD was 10. A score corresponding to a z-score of -2.5 is
On a certain exam, the average of the scores was 50 and the SD was 10.
A score corresponding to a z-score of -2.5 is .
A score corresponding to a z-score of 3 is .
QUESTION 3
On many datasets, roughly % of the data falls within one standard deviation of the mean.
On many datasets, roughly % of the data falls within two standard deviation of the mean.
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