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Home > Percentile

In descriptive statistics, a percentile is any of the 99 values that divide the sorted data into 100 equal parts, so that each part represents 1/100th of the sample or population.

Thus:

• 1st percentile = cuts off lowest 1% of data
• 98th percentile = cuts off lowest 98% of data

Some percentiles have special names:

• The 10th, 20th, ... 90th percentiles are called Decile s.
• The 25th, 50th, and 75th percentiles are called Quartiles.
• The 50th percentile is called the Median.

Calculating Percentiles:

See Quantile for methods. The percentile is calculated as the 100-quantile.

See also:

• Quantile
• Quartile
• Summary statistics

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Topics: Percentile Percentiles *the Quantile Called Data Statistics...

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Percentile rankThe percentile rank of a score is the percentage of scores in its frequency distribution which are lower. For example, a test score which is greater than 90% of the scores of people taking the test is said to be at the 90th percentile. Percentile ranks ar Percentilequantile In descriptive statistics, a percentile is any of the 99 values that divide the sorted data into 100 equal parts, so that each part represents 1/100th of the sample or population. Thus: 1st percentile cuts off lowest 1% of data 98th percentile cu Percentile dieThe percentile die (also known as d or d100 is generally a combination of two ten-sided dice (or d10s), often made distinguishable from each other by colour. One die is rolled to determine the "tens" digit, and one is rolled to determine the "ones" digit.