If you don’t want to do it in parts, you can get the IQR directly with this single formula: =QUARTILE.INC(B2:B16,3)-QUARTILE.INC(B2:B16,1) So, this is a simple formula you can use to calculate IQR in Excel. Excel has three Quartile functions – QUARTILE, QUARTILE.INC, and QUAR...
2. Next, we need to calculate Q3. To calculate Q3 in Excel, simply find an empty cell and enter the formula ‘=QUARTILE(array, 3)‘. Again, replacing the ‘array‘ part with the cells that contain the data of interest. 3. Finally, to calculate the IQR, simply subtract the Q1 value...
The “1” in this Excel formula(A2:A10,1) represents the first quartile (i.e the point lying at 25% of the data set). Click a second blank cell (for example, click cell B3) and then type =QUARTILE(A2:A10,3). Replace A2:A10 with the actual values from your data set. The “3...
To follow along, download the Excel file:IQR. This dataset is the same as the one I use in the illustration above. This file also includes the interquartile range calculations for finding outliers and the IQR normality test described later in this post. In Excel, you’ll need to use the ...