## 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) | |
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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