Home
Class 9
MATHS
Find the quartile deviation of the follo...

Find the quartile deviation of the following discrete series.
`{:(x,7,5,4,8,12,10),(f,2,4,6,10,9,7):}`

A

6.5

B

4.5

C

3.5

D

2.5

Text Solution

Verified by Experts

The correct Answer is:
D
(i) `QD = (Q_(3) - Q_(1))/(2)`
(ii) Find the cumulative frequency.
(iii) Identify the x value corresponding to `((N)/(2))`th observation and `((3N)/(2))`th observation.
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    PEARSON IIT JEE FOUNDATION|Exercise LEVEL-3|19 Videos

  • STATISTICS

    PEARSON IIT JEE FOUNDATION|Exercise LEVEL-1|30 Videos

  • SIMPLE INTEREST AND COMPOUND INTEREST

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION|1 Videos

  • TRIGONOMETRY

    PEARSON IIT JEE FOUNDATION|Exercise Level 3|15 Videos

Similar Questions

Explore conceptually related problems

Find the quartile deviation of the following discrete series. {:(x,3,5,6,8,10,12),(f,7,2,3,4,5,6):}

Find the quartile deviation of the following discrete series. {:(x,8,10,13,16,19,22),(f,4,7,8,3,5,4):}

The Median of the following discrete series is {:(x_(i),3,6,5,8,12,7),(f_(i)"",5,2,4,6,7,6):}

Find the mode of the following discrete series. {:(x,1,2,3,4,5,6,7,8,9),(f,3,8,15,1,9,12,14,5,7):}

Find the mode of the following discrete series. {:(x,1,2,3,4,5,6,7,8,9),(f,3,8,15,1,9,12,14,5,7):}

The mode of the following discrete series is: {:(x_(i), 1,3,5,6,12,15),(f_(i)"",5,7,3,8,6,5):}

Find the mode of the following discrete series. {:(x,f," "x,f),(1,5," "5,12),(2,4," "6,3),(3,6," "7,9),(4,8," "8,10):}

Find the quartile deviation of the following data: {:(x,f," "x,f),(2,4," "13,2),(3,6," "17,4),(5,8," "19,6),(7,9," "23,6),(11,10," ",):}

Find the mode of the following discrete series. {:(x,f," "x,f),(1,5," "6,8),(3,7," "12,6),(5,3," "15,5):}

Find semi-inter quartile range of the following data: {:("X",3,6,7,9,10,11,13),("f",2,9,13,17,10,14,15):}

PEARSON IIT JEE FOUNDATION-STATISTICS-LEVEL-2
  1. If the ratio of mean and median of a certain data is 2:3, then find...

    Text Solution

    |

  2. If the mean of the following distribution is 13, then p = {:(x(i) :...

    Text Solution

    |

  3. If the ratio of mode and median of a certain data is 6:5, then find...

    Text Solution

    |

  4. If the arithmetic mean of the following distribution is 8.2, then a = ...

    Text Solution

    |

  5. The median of the series 8,12,15,7,x,19,22 lies in the interval

    Text Solution

    |

  6. The mode of the following distribution is {("Class interval",f),(" ...

    Text Solution

    |

  7. The mean of the following data is {("Class interval",f),(" "10-15,5)...

    Text Solution

    |

  8. The median of the following frequency distribution is {:("Class inte...

    Text Solution

    |

  9. Find the quartile deviation of the following discrete series. {:(x,7...

    Text Solution

    |

  10. Find the number of students who scored less than or equal to 50% if ma...

    Text Solution

    |

  11. Find the number of students who scored greater than or equal to 90% of...

    Text Solution

    |

  12. In a class of 15 students, on an average, each student got 12 books. I...

    Text Solution

    |

  13. Find the quartile deviation of the following discrete series. {:(x,...

    Text Solution

    |

  14. {:("Weight(in kg)","Number of students"),(" "20," "8),("...

    Text Solution

    |

  15. Find the mean deviation (approximately) about the mean for the followi...

    Text Solution

    |

  16. If the average mark of 15 students is 60 and the average mark of anoth...

    Text Solution

    |

  17. In a class of 25 boys and 20 girls, the mean weight of the boys is 40 ...

    Text Solution

    |

  18. If p lt q lt 2p, the median and mean of p, q and 2p are 36 and 31 resp...

    Text Solution

    |

  19. If x lt y lt 2x, the median and the mean of x, y and 2x are 27 and 33 ...

    Text Solution

    |

  20. The mean of a set of 12 observations is 10 and another set of 8 observ...

    Text Solution

    |