The lower and upper quartiles are the first and third quarters of the data points. In effect, they are the middle values of the first half and second half of the data.

Knowing the lower and upper quartile provides information on how big the spread is and if the dataset is skewed toward one side. Since quartiles divide the number of data points evenly, the range is …

Nov 4, 2025 · This quartile calculator and interquartile range calculator finds first quartile Q 1, second quartile Q 2 and third quartile Q 3 of a data set. It also finds median, minimum, maximum, and …

Jul 24, 2025 · 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 …

May 20, 2022 · The second quartile (Q2, or the median) is the 50th percentile, meaning that 50% of the data falls below the second quartile. The third quartile (Q3, or the upper quartile) is the 75th …

Learn how to calculate the interquartile range from a variety of different data types and draw and interpret box-and-whisker diagrams.

Aug 3, 2025 · Discover what quartiles are in statistics, how to calculate them, and see examples to help you interpret data more effectively. Learn about lower, median, and upper quartiles.

Quartiles are the values that divide a list of numbers into quarters. There are different methods, here we use the simple method of splitting...

The simple method for finding quartiles is to list the values in your dataset in numeric order. Then find the three values that split your data into quarters, as shown below.

Here you will learn about a quartile, including what a quartile is, how to find the lower quartile and upper quartile for a set of data, and why these measures are useful. Students will first learn about quartiles …