PR = percentile rank, the answer will be a percentage

Pcf = cumulative frequency of all the values below the critical value

P = raw score or value for which one wants to find a percentile rank L

B = lower boundary of the kth percentile class

N = total frequency

i = size of the class intervalic

The quartiles may be determined from grouped data in the same way as the median except that in place of n/2 we will use n/4

The values which divide an array into ten equal parts are called deciles. The first, second,…… ninth decile d1-d2-d3

The values which divide an array into one hundred equal parts are called percentiles. The first, second,……. Ninety-ninth percentile are denoted by

Rank the data from lowest to highest.

Multiply the sample size by k/100 to find the depth of the kth percentile.

Multiply the sample size by k/100 to find the depth of the kth percentile. If the depth is a whole number, add 0.5. If the depth is not a whole number, round up to the next higher whole number.

The kth percentile is the value in the depth position.

A measure of position determines the position of a single value in relation to other values in a sample or a population data set.