SAT Math· difficulty 5/5
A data set of 100 exam scores has mean 75, median 78, and SD 12. Which statement is most reasonable?
The distribution is slightly left-skewed (mean < median).
All scores are above 75.
The distribution is exactly symmetric.
All scores fall within 12 points of the mean.
Explanation
Mean (75) less than median (78) suggests left-skew (some low outliers pulling the mean down). The other options overgeneralize.
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