What is the answer ?Suppose that a Normal model described student scores in a history class. Parker has a standardized score (z-score) of +2.5. This means that Parker A) has a standard deviation of 2.5. B) has a score that is 2.5 times the average for the class. C) is 2.5 points above average for the class. D) is 2.5 standard deviations above average for the class. E) None of the above.
Standard deviation
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