Home
Class 9
MATHS
Find the mean deviation about mean for t...

Find the mean deviation about mean for the following data:
`{:(x,1,3,7,9,13,14),(f,2,5,8,6,3,1):}`

Text Solution

Verified by Experts


`bar(x) = "AM" = (sum fx)/(sum f) rArr bar(x) = (180)/(25) = 7.2`
`therefore "MD" = (sum fd)/(N) = (70)/(25) = 2..8`.
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    PEARSON IIT JEE FOUNDATION|Exercise VERY SHORT ANSWER TYPE QUESTIONS|30 Videos

  • STATISTICS

    PEARSON IIT JEE FOUNDATION|Exercise SHORT ANSWER TYPE QUESTIONS|14 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 mean deviation about the mean for the following data :

Find the mean deviation about the mean for the following data :

Find the mean deviation about the mean for the following data.

Find the mean deviation about the median for the following data:

Find the mean deviation about mean for the following data: 14,21,28,21,18

Calcualte the mean deviation about mean for the following data:

Find the mean deviation about the mean for the following data : 9,2,7,10,5,12,4,7

Find the mean deviation about the median for the following data. {:(x,1,2,3,4,5,6),(f,3,7,5,8,2,5):}

PEARSON IIT JEE FOUNDATION-STATISTICS-LEVEL-3
  1. Find the mean deviation about mean for the following data: {:(x,1,3,...

    Text Solution

    |

  2. A Class of 40 students is divided into four groups named as A, B, C an...

    Text Solution

    |

  3. Life (in hour) of 10 bulbs from each of four different companies A, B,...

    Text Solution

    |

  4. If the mode of the observations 5, 4, 4, 3, 5, x, 3, 4, 3, 5, 4, 3 an...

    Text Solution

    |

  5. In a colony, the average age of the boys is 14 years and the average a...

    Text Solution

    |

  6. Find the median of the following data. {:("Class Interval",f),(" "0...

    Text Solution

    |

  7. In a class of 20 students, 10 boys brought 11 books each and 6 girls b...

    Text Solution

    |

  8. The mean of a set of 20 observations is 8 an another set of 30 observa...

    Text Solution

    |

  9. Find the approximate value of mean deviation about the mode of the fol...

    Text Solution

    |

  10. The mean of the following distribution is 4. Find the value of q. {:...

    Text Solution

    |

  11. If the ratio of mean and median of a certain data is 5 : 7, then find ...

    Text Solution

    |

  12. Find the mode of the following discrete series. {:(x,1,2,3,4,5,6,7,8...

    Text Solution

    |

  13. Find the median of the following data. {:(x,12,15,18,21,24),(f,4,7,2...

    Text Solution

    |

  14. Find the mean deviation about the median for the following data. {:(...

    Text Solution

    |

  15. Find the mode for the following data. {:("Class Interval",f),(" "0-...

    Text Solution

    |

  16. Find the quartile deviation of the following discrete series. {:(x,8...

    Text Solution

    |

  17. Find the arithmetic mean of the observations x + 5, x + 6, x + 10, x +...

    Text Solution

    |

  18. Find the mode of the following discrete series. {:(x,1,2,3,4,5,6,7,8...

    Text Solution

    |

  19. Find the mean of the following continuous distribution. {("Class Int...

    Text Solution

    |

  20. Which of the following is not changed for the observations 31, 48, 50,...

    Text Solution

    |