Home
Class 9
MATHS
If barx represents the mean of n observa...

If `barx` represents the mean of n observations `x_1, x_2,…….,x_n` , then value of `sum_(i=1)^n (x_1-barx)` is :

Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    MODERN PUBLICATION|Exercise EXERCISE|239 Videos

  • QUADRILATERALS

    MODERN PUBLICATION|Exercise EXERCISE|133 Videos

  • SURFACE AREAS AND VOLUMES

    MODERN PUBLICATION|Exercise EXERCISE|228 Videos

Similar Questions

Explore conceptually related problems

If barx is the mean of x1, x2,x2,x3, ………..xn , then the mean of x1+a,x2+a, x3+a...xn+a

Given that bar x is the mean and sigma^2 is the variance of n observations x_1, x_2, ... x_n . Prove that the mean and variance of the observations ax_1, ax_2, ... ,ax_n , are a bar x and a^2 sigma^2 respectively (a ne 0) .

Given that bar x is the mean and sigma^2 is the variance of n observations x_1 , x_2 ,.... x_n . Prove that the mean and variance of the observations ax_1, ax_2, ax_3 ,......, ax_n are a bar x and a^2 sigma^2 , respectively, (a ne 0) .

If sum_(i=1)^(n) cos theta_(i)=n , then the value of sum_(i=1)^(n) sin theta_(i) .

If sum_(i=1)^(n) cos theta_(i)=n , then the value of sum_(i=1)^(n) sin theta_(i) .

If barx is the mean of ten natural numbers x_1,x_2,x_y………..x_10 show that: (x_1-barx)+(x_2-barx)+……….+(x_10………barx)=0

If barx is the mean of x1,x2,x3, ………..xn , then for a ne 0, the mean of ax_1,ax_2,…..,ax_n,(x_2)/a, (x_2)/a ,……., (x_n)/a is :

MODERN PUBLICATION-STATISTICS-EXERCISE
  1. If the median of 33,28,20,25,34,x is 29. find the maximum value of x.

    Text Solution

    |

  2. If the mode of 13,14,15,14,16,15,x is 14, find the value of x.

    Text Solution

    |

  3. If barx represents the mean of n observations x1, x2,…….,xn , then val...

    Text Solution

    |

  4. The mid value of a class interval is 42 and the class size is 10. find...

    Text Solution

    |

  5. Let barx be the mean of x1,x2,……,xn and bary the mean of y1,y2……,yn ba...

    Text Solution

    |

  6. If each observation of a data is increased by 3, then what about the n...

    Text Solution

    |

  7. True/false Mean, Median and Mode are measures in same units.

    Text Solution

    |

  8. True/false Class Mark of 90-120 is 100.

    Text Solution

    |

  9. True/false Mode of 2,3,9,16,3,9, is 16.

    Text Solution

    |

  10. True/false For the set of numbers 2,2,4,5 and 12, then Mean>mode

    Text Solution

    |

  11. True/false Is arithmetic mean of 7,5,13,x and 9 is 10, then x is 5.

    Text Solution

    |

  12. True/false Empirical relatin between mean, mode and median is Mode=2Me...

    Text Solution

    |

  13. True/false Median 0,2,2,2,-3.5,-1.5,-3,6,6,5,6 is 3.5.

    Text Solution

    |

  14. True/false If the mean of 5 observation x,x+2,x+4,x+6,x+8 is 11, then ...

    Text Solution

    |

  15. Let m be the mid-point and l be the upper class limit of a class in a ...

    Text Solution

    |

  16. True/false 10 observations 6,14,15,17,x+1,2x-13,30,32,34,43 are writte...

    Text Solution

    |

  17. Fill ups Data collected by an investigator himself is called…….data.

    Text Solution

    |

  18. Fill ups Raw data when presented in ascending or descending order form...

    Text Solution

    |

  19. Fill ups Minimum value on subtraction from maximum value gives………….. .

    Text Solution

    |

  20. Fill ups Mode of the value of data which occurs …………..number of times.

    Text Solution

    |