= How do I find out how many people have a score above a certain value? = Percentiles give the percentage of people who have a score below a threshold score. Percentile (score) = 100 $$\frac{\mbox{n} \leq \mbox{score}}{\mbox{N}}$$ 100 - Percentile (score) = 100 $$\frac{\mbox{n} \gt \mbox{score}}{\mbox{N}}$$ The score percentiles can be obtained by running the below in SPSS. {{{ FREQUENCIES VAR=SCORE. EXE. }}} or the below in R: {{{ score <- sort(score) perc <- rep(-99,length(score)) ict <- 1 b <- duplicated(score) for (ict in 1:length(score) { for (i in score) { perc[ict] <- 100*sum(score<=i)/length(score) ict <- ict+1 } } (percu <- perc[!duplicated(perc)]) (scoreu <- score[!duplicated(score)]) percu scoreu }}}