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One of the three points that divide a range of data or population into four equal parts.

The first quartile (also called the lower quartile) is the number below which lies the 25 percent of the bottom data. The second quartile (the median) divides the range in the middle and has 50 percent of the data below it. The third quartile (also called the upper quartile) has 75 percent of the data below it and the top 25 percent of the data above it. See also interquartile range and percentile.

Use 'quartile' in a Sentence

Our applicant was in the first quartile for his intelligence assessment so it was evident that he had all of the necessary qualifications to succeed.
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I had to find the middle number between the smallest number and the median and my friend informed me that this was called the quartile.
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When you are trying to break down and crunch the numbers knowing where things stand on each quartile makes it easier.
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