The difference in underlying raw score points between percentiles of 90 and 99 is ________that between percentiles of 50 and 59.
A) greater than
B) less than
C) the same as
D) of unknown relation to

Question

Quizplus · Accepted Answer

The distribution of scores on many standardized tests is often approximately normal (bell-shaped). In a normal distribution, the difference in raw scores between higher percentiles (e.g., 90th to 99th) is greater than that between lower percentiles (e.g., 50th to 59th) because the curve is steeper in the tails than in the middle.

The Difference in Underlying Raw Score Points Between Percentiles of 90