# Definition of a Percentile in Statistics.

Percentile definition is - a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it. How to use percentile in a sentence.

A percentile is not a percent; a percentile is a value (or the average of two values ) in the data set that marks a certain percentage of the way through the data. Suppose your score on the GRE was reported to be the 80th percentile. This doesn’t mean you scored 80% of the questions correctly. It means that 80% of the students’ scores were lower than yours and 20% of the students’ scores.

For example, if your child scores in the 90th percentile on a math section that means your child performs as well as or better than 90 percent of the population on that particular given test. It is often detected in children if they are found to be in the low percentile of growth.

Percentile definition, one of the values of a variable that divides the distribution of the variable into 100 groups having equal frequencies: Ninety percent of the values lie at or below the ninetieth percentile, ten percent above it. See more.

Finding percentiles in a data set can be a useful way to organize and compare numbers in a data set. Perfect Percentiles Holly just took her first math test in her college algebra class.

For example if you take the SAT and score 60% on the test you may find you are only in the 40 th percentile. This is because it depends on how many other people scored 60% out of the total number who took the test. The percentile is relative to the score that other people made on the test, while percentage is your individual score. Percentile is used when scoring standardized tests, and is.

This example teaches you how to use the PERCENTILE and QUARTILE function in Excel. Below you can find a list of scores (green fill for illustration only). 1. Use the PERCENTILE function shown below to calculate the 30th percentile. Excel returns the value 12.7. This means that 30% (6 out of 20) of the scores are lower or equal to 12.7.

Using the second definition, we need to find the value that is greater than or equal to 70% of the values. Thanks to the “equal to” portion of the definition, we can use the 8 th ranked value, which is 35. Using the first two definitions, we have found two values for the 70% percentile—35 and 40. Definition 3: Using an Interpolation Approach.

Definition of percentile noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Percentiles. Percentiles are used in statistics as a way of determining rank or order in relation to other points in a distribution of numbers or scores. A percentile is a value below the point where a particular percent of scores or observations falls. For example, the 25th percentile is the number that 25% of the scores are below. Percentile.

The SAT is an example of a standardized test that provides a score percentile. Often used as part of the college admissions process, a score of 1400 or higher (or the 75th percentile) is considered a good score. This number indicates that 75 percent of students scored at or below 1400, while 25 percent of students scored above 1400.