In statistics, the percentile rank of a score (PR) is the percentage of scores in its frequency distribution that are less than that score. Its mathematical formula is. P R = C F − ( 0.5 × F ) N × 100 , {\displaystyle PR= {\frac {CF- (0.5\times F)} {N}}\times 100,} where CF —the cumulative frequency—is the count of all scores less than or equal to the score of interest, F is the frequency for the score of interest, and N is the number of scores in the distribution.
If you do the work, you will learn more.
Calculate the percentile rank for each student’s quiz result in a grade 12 math class.
Mark Frequency
4.0 2
5.0 6
6.0 8
7.0 13
8.0 4
9.0 3
10.0 2
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