How do you calculate the interquartile range?
The interquartile range formula is the first quartile subtracted from the third quartile: IQR = Q3 – Q1.
How do you find the interquartile range for dummies?
The IQR equals Q3 – Q1 (that is, the 75th percentile minus the 25th percentile) and reflects the distance taken up by the innermost 50% of the data. If the IQR is small, you know the data are mostly close to the median. If the IQR is large, you know the data are more spread out from the median.
