Essay
The ACT is an exam used by colleges and universities to evaluate undergraduate applicants. The test scores are
normally distributed. In a recent year, the mean test score was 22.2 and the standard deviation was 4.9. The test
scores of four students selected at random are 16, 24, 9, and 35.
a)Find the z-scores that correspond to each value.
b)Determine whether any of the values are unusual.
Correct Answer:
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