Given here is a simple online 25th percentile calculator to find the 25th rank of percentile. 25th Percentile is also referred to as the first quartile in statistics. For example, a test score that is greater than or equal to 25% of the scores of people taking the test is said to be 25th percentile, where 25 is the percentile rank. Refer the below first quartile calculator for the calculation of 25th percentile rank and value for a set of statistical data.
Find the 25th percentile rank for scores such as : 8,12,15,9,7.
R = 0.25 x (N+1)
= 0.25 x (5+1)