Find the quartiles and interquartile range (IQR) of a data set. Enter the numbers separated by commas.
IQR
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Middle 50 percent.Usage Tip
Unlike range, the IQR ignores extreme values — it is the basis of the box in a box-and-whisker plot.
THE MATH
Q1, Q2 (median), Q3 split the data into quarters
IQR = Q3 − Q1
IQR = Q3 − Q1
Quartiles divide ranked data into four equal parts.
The interquartile range is the spread of the middle half, a measure of variability resistant to outliers.
The interquartile range is the spread of the middle half, a measure of variability resistant to outliers.
Enter four or more numbers separated by commas.
Q1 and Q3 are the medians of the lower and upper halves.
The IQR is used to detect outliers (beyond 1.5 times IQR past a quartile).
Q1 and Q3 are the medians of the lower and upper halves.
The IQR is used to detect outliers (beyond 1.5 times IQR past a quartile).