If test score data is approximately normally distributed, which of the following is generally true of percentile ranks?
a) There will be more difference in raw scores between percentile ranks of 10 and 20 than between percentile ranks of 42 and 52.
b) There will be more difference in raw scores between percentile ranks of 45 and 50 than between percentile ranks of 50 and 65.
c) There will be more difference in raw scores between percentile ranks of 10 and 20 than between percentile ranks of 80 and 90.
d) There will be more difference in raw scores between percentile ranks of 25 and 30 than between percentile ranks of 55 and 60.
a
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