For example, use the QUARTIL function to determine the top 25 percent of income in a population. First quartile (25th percentile).

Statistical Calculator: Quartiles

To calculate the quartile of a data series, after sorting from lowest to highest, we can use the following formula, where a will take the values of 1,2 and

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José Andalón explains the concept of quartiles in a sequence of unclustered data and exercises.

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