How To Find Iqr In Excel

To find the Interquartile Range (IQR) in Excel, use the formula “=QUARTILE(range, 3) – QUARTILE(range, 1)”, where “range” is the data range, and the output will be the expectation for IQR.

In the world of data analysis, it is crucial to have a clear understanding of the distribution and variability of your data. One common measure of variability is the Interquartile Range (IQR), which provides valuable insights into the spread of the data. Excel, with its powerful features and functions, offers a convenient way to calculate the IQR. In this blog post, we will explore the step-by-step process of finding the IQR in Excel, enabling you to gain a deeper understanding of your data and make more informed decisions. So, let’s dive in and learn how to harness the analytical power of Excel to unlock the mysteries hidden within your datasets.

How To Find Iqr In Excel: Step-by-Step


Step 1: Input Data

To calculate the interquartile range (IQR), input your set of numbers in a column or row format, and the IQR will be determined. This statistical measure provides insights into the spread and variability within your dataset.

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Step 2: Organize Data

To arrange data in ascending order, select the data and go to the data tab. Click on the ‘Sort Ascending’ icon.

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Step 3: Calculate Q1

The QUARTILE.INC function is used to calculate Q1, the first quartile. Simply input “=QUARTILE.INC(range,1)” in an empty cell, replacing “range” with your data set. The “1” signifies the desired quartile to be calculated.

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Step 4: Calculate Q3

To find the third quartile, or Q3, in your data set, you can use the QUARTILE.INC function. Simply type “=QUARTILE.INC(range,3)” in an empty cell, replacing “range” with the range covering your data. The “3” specifies that you want to calculate Q3.

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Step 5: Find IQR

To calculate the interquartile range (IQR), simply subtract the value of Q1 from the value of Q3. This can be done in a separate cell by subtracting the cell containing Q1 from the cell containing Q3.

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Step 6: Review Result

The interquartile range (IQR) is the difference between the upper and lower quartiles of a dataset. It provides a measure of the spread or variability in the middle 50% of the data.


In conclusion, finding the Interquartile Range (IQR) in Excel is a crucial skill for data analysis. By understanding the steps and formulas involved, you can easily calculate the IQR and gain valuable insights from your data. Excel provides several functions, such as QUARTILE and IF, that simplify the process and make it accessible even to those with limited programming knowledge. Remember to properly organize your data and familiarize yourself with Excel’s capabilities, ensuring accurate and efficient calculations. With this newfound knowledge, you’ll be equipped to unravel the distribution and variability of your datasets, allowing you to make informed decisions and discoveries. So, go ahead and apply these techniques to your data analysis tasks, confidently wielding Excel’s power to uncover the hidden gems within your data.

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