Home
Class 11
MATHS
If for a sample of size 60, we have the ...

If for a sample of size 60, we have the following information `sumx_i^2=18000 \ and \ sumx_i=960` , then the variance is (a) 6.63 (b) 16 (c) 22 (d) 44

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • SOME SPECIAL SERIES

    RD SHARMA ENGLISH|Exercise All Questions|69 Videos

  • THE CIRCLE

    RD SHARMA ENGLISH|Exercise All Questions|145 Videos

Similar Questions

Explore conceptually related problems

If for a sample of size 60, we have the following information sumx_i^2=18000 \ and \ sumx_i^2=960 , then the variance is (a) 6.63 (b) 16 (c) 22 (d) 44

If for a sample of size 60, we have the following information sum(x_(i))^2=18000 and sumx_(i)=960 , then the variance is

If for a sample of size 60, we have the following information sumxi^2=18000a n dsumxi=960 , then the variance is a)6.63 (b) 16 (c) 22 (d) 44

If n=10 , X =12 and sumx_(i)^2=1530 , then the coefficient of variation is (a) 36% (b) 41% (c) 25% (d) none of these

If for a sample size of 10 , sum_(i=1)^(10)(x_i-5)^2=350 and sum_(i=1)^(10)(x_i-6)=20 , then the variance is

If A^2-A +I = 0 , then the inverse of A is: (A) A+I (B) A (C) A-I (D) I-A

If A^2-A +I = 0 , then the inverse of A is: (A) A+I (B) A (C) A-I (D) I-A

If for a distribution sumx_(i)^2=2400 and sumx_(i)=250 and the total number of observations is 50, then variance is

y=x is tangent to the parabola y=ax^(2)+c . If c=2, then the point of contact is (a) (3,3) (b) (2,2) (c) (6,6) (d) (4,4)

In Figure, if l_1 || l_2, the value of x is (a) 22 1/2 (b) 30 (c) 45 (d) 60

RD SHARMA ENGLISH-STATISTICS-All Questions
  1. The scores of a batsman in 10 matches were as follows: 38,70,48,34,...

    Text Solution

    |

  2. The mean and variance of 7 observation is 8 and 16. If five of the obs...

    Text Solution

    |

  3. If for a sample of size 60, we have the following information sumxi^2=...

    Text Solution

    |

  4. The mean and standard deviation of 20 observations are found to be ...

    Text Solution

    |

  5. Consider the numbers 1,2,3,4,5,6,7,8,9,10. If 1 is added to each num...

    Text Solution

    |

  6. If for distribution of 18 observations sum(xi-5)=3a n dsum(xi-5)^2=43 ...

    Text Solution

    |

  7. If the men and standards deviation of 100 observations are 50 and 4 ...

    Text Solution

    |

  8. Let x1,\ x2,\....,\ xn values of variable X and let 'a' be non zero re...

    Text Solution

    |

  9. If two variates X a n d Y are connected by the relation Y=(a X+b)/c ,w...

    Text Solution

    |

  10. Let x1, x2, x3, , be n values of a variable X. If these values are ch...

    Text Solution

    |

  11. If for a sample of size 60, we have the following information sumxi^2=...

    Text Solution

    |

  12. The weight of coffee in 70 jars is shown in the following table: Weigh...

    Text Solution

    |

  13. Suppose that samples of polythene bags from two manufacturers, A and B...

    Text Solution

    |

  14. Let x1, x2, ...... ,xn be values taken by a variable Xa n dy1, y2,......

    Text Solution

    |

  15. The sum of the squares of deviation of 10 observations from their mean...

    Text Solution

    |

  16. If the S.D. of a set of observations is 8 and if each observation is ...

    Text Solution

    |

  17. Find the mean and variance of frequency distribution given below: xi :...

    Text Solution

    |

  18. The mean deviation of the series a , a+d , a+2d , , a+2n from its mea...

    Text Solution

    |

  19. The standard deviation of the data: x : , 1, a , a^2 , ..., a^n f: , ...

    Text Solution

    |

  20. The mean deviation of the numbers 3,4,5,6,7 from the mean is(a) 25  ...

    Text Solution

    |