Inter Quartile Range for grouped data

Use this calculator to find the Inter Quartile Range for grouped (frequency distribution) data.

Inter Quartile Range Calculator (Grouped Data)
Type of Freq. Dist. DiscreteContinuous
Enter the Classes for X (Separated by comma,)
Enter the frequencies (f) (Separated by comma,)
Results
Number of Obs. (N):
First Quartile : ($Q_1$)
Second Quartile : ($Q_2$)
Third Quartile : ($Q_3$)
Inter Quartile Range : $IQR$

Inter Quartile Range for grouped data

Formula

$IQR =Q_3-Q1$

where

  • $Q_1$ is the first quartile
  • $Q_3$ is the third quartile

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