Interquartile range excel inclusive or exclusive
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This tutorial explains how to calculate the interquartile range of a dataset in Excel.
What is the Interquartile Range?
The interquartilerange, often denoted IQR, is a way to measure the spread of the middle 50% of a dataset.
It is calculated as the difference between the first quartile* (Q1) and the third quartile (Q3) of a dataset.
*Quartiles are simply values that split up a dataset into four equal parts.
For example, suppose we have the following dataset:
[58, 66, 71, 73, 74, 77, 78, 82, 84, 85, 88, 88, 88, 90, 90, 92, 92, 94, 96, 98]
The third quartile turns out to be 91 and the first quartile is 75.5.
Thus, the interquartile range (IQR) for this dataset is 91 – 75.5 = 15. This tells us how spread out the middle 50% of the values are in this dataset.
How to Calculate the Interquartile Range in Excel
Microsoft Excel doesn’t have a built-in function to calculate the IQR of a dataset, but we can easily find it by using the QUARTILE() function, which takes the following arguments:
QUARTILE(array, quart)
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