quartile

noun quar·tile \ ˈkwȯr-ˌtī(-ə)l , -tᵊl \
Updated on: 13 Oct 2017

Definition of quartile

:any of the three values that divide the items of a frequency distribution into four classes with each containing one fourth of the total population; also :any one of the four classes

Recent Examples of quartile from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quartile.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Did You Know?

A quartile is a quarter of a specific group that has been tested or evaluated in specific ways. The first quartile is the one that scores highest and the fourth quartile scores lowest. For achievement and proficiency tests, the first quartile is the place to be; for blood pressure or cholesterol, the third quartile is healthier.

Origin and Etymology of quartile

International Scientific Vocabulary, from Latin quartus


Financial Definition of QUARTILE

quartile

What It Is

A quartile is one of four equal parts.

How It Works

For example, if we were to look at all of the closing prices for Company XYZ stock for every day in the last year, the top 25% of those prices would represent the upper quartile of the data. The bottom 25% of those prices would represent the lower quartile of the data. There would be two quartiles in between the upper and lower quartiles. The average of all the stock prices typically falls right in the middle, between the second and third quartiles.

Why It Matters

Quartiles are crucial for studying economic data, income data, stock data and virtually any other kind of financial information. By breaking things into quartiles, an analyst can make a variety of inferences about the data and how the observed item behaves.


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