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  1. Quartile - Wikipedia

    The data must be ordered from smallest to largest to compute quartiles; as such, quartiles are a form of order statistic. The three quartiles, resulting in four data divisions, are as follows: The first quartile …

  2. Understanding Quartiles: Definitions, Calculations, and Examples

    Mar 30, 2026 · Quartiles are statistical measures that divide a data set into four equal parts, each representing 25% of the observations. By arranging data points in increasing order, you can identify …

  3. Quartiles - Math is Fun

    Quartiles are the values that divide a list of numbers into quarters. To do this we halve the list at the median, then halve each of those...

  4. Quartiles - GeeksforGeeks

    Apr 15, 2026 · Quartiles divide a data set into four equal parts, each containing 25% of the data. They help to understand the spread and center of the data. As an important concept in statistics, quartiles …

  5. Quartile: Definition, Finding, and Using - Statistics by Jim

    Quartiles are three values that split your dataset into quarters. Quartiles are the values that make the “cuts” in a dataset.

  6. Quartiles & Quantiles | Calculation, Definition & Interpretation

    May 20, 2022 · The first quartile (Q1, or the lowest quartile) is the 25th percentile, meaning that 25% of the data falls below the first quartile. The second quartile (Q2, or the median) is the 50th percentile, …

  7. Quartiles: What they are and how to calculate them - Andrea ...

    There are three quartiles: The first quartile (Q1) represents the first 1/4 of the data set (25%). The second quartile (Q2) represents the first 2/4 of the data set (50%). The third quartile (Q3) represents …

  8. Quartile - Math.net

    In statistics, a quartile is an element in a data set, ordered from smallest to largest, that divides the set into four parts, or quarters. The four parts are more or less equal in size, but can vary slightly …

  9. What are Quartiles? Complete Beginner's Guide with Examples ...

    Oct 17, 2025 · Quartiles are values that divide a dataset into four equal parts. They are one of the most commonly used measures in statistics to understand the distribution and spread of data. Think of …

  10. What Are Quartiles? Statistics 101 | Outlier

    Mar 26, 2023 · The first quartile—also called the lower quartile or Q1—marks the 25th percentile of a data set. It divides the bottom quarter of your data from the second quarter.