I have computed all the z-scores of the ages and the heights.
Using the z-score of ±1.645 for the 5 percent cutoff and the z-score of ±1.96 for the 2.5 percent in the tail,
identify the number for subjects who are closest to the cutoff for the upper 2.5 percent and 5 percent of the
scores and the lower 2.5 percent and 5 percent of the scores.
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