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Median of Grouped Data

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Important Questions

Class interval | Frequency |

$0−100$ | $2$ |

$100−200$ | $5$ |

$200−300$ | $x$ |

$300−400$ | $12$ |

$400−500$ | $17$ |

$500−600$ | $20$ |

$600−700$ | $y$ |

$700−800$ | $9$ |

$800−900$ | $7$ |

$900−1000$ | $4$ |

Medium

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Class | $0−5$ | $5−10$ | $10−15$ | $15−20$ | $20−25$ |

Frequency | $10$ | $15$ | $12$ | $20$ | $9$ |

Medium

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Medium

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Easy

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Age in years | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |

No. of persons | $5$ | $25$ | ? | $18$ | $7$ |

Medium

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Age in years | Number of policy holders |

Below 20 | $2$ |

Below 25 | $6$ |

Below 30 | $24$ |

Below 35 | $45$ |

Below 40 | $78$ |

Below 45 | $89$ |

Below 50 | $92$ |

Below 55 | $98$ |

Below 60 | $100$ |

Medium

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Class | $0−10$ | $10−20$ | $20−30$ | $30−40$ | $40−50$ | $50−60$ | $60−70$ |

Frequency | $4$ | $4$ | $8$ | $10$ | $12$ | $8$ | $4$ |

Easy

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Number of cars | $0−10$ | $10−20$ | $20−30$ | $30−40$ | $40−50$ | $50−60$ | $60−70$ | $70−80$ |

Frequency | $7$ | $9$ | $13$ | $21$ | $12$ | $15$ | $4$ | $12$ |

Medium

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(i)Marks | No. of students | (ii)Marks | No. of students |

Less than $10$ | $0$ | More than $150$ | $0$ |

Less than $30$ | $10$ | More than $140$ | $12$ |

Less than $50$ | $25$ | More than $130$ | $27$ |

Less than $70$ | $43$ | More than $120$ | $60$ |

Less than $90$ | $65$ | More than $110$ | $105$ |

Less than $110$ | $87$ | More than $100$ | $124$ |

Less than $130$ | $96$ | More than $90$ | $141$ |

Less than $150$ | $100$ | More than $80$ | $150$ |

Medium

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Variable | 10 - 20 | 20 - 30 | 30 - 40 | 40 - 50 | 50 - 60 | 60 - 70 | 70 - 80 | Total |

Frequency | 12 | 30 | P | 65 | Q | 25 | 18 | 230 |

Medium

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