Home
Class 12
MATHS
The following information relates to a s...

The following information relates to a sample of size 60 : `sum x^(2) = 18000, sum x = 960`. The variance is :

A

6.63

B

16

C

22

D

44

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • SETS,RELATIONS AND FUNCTIONS

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|285 Videos

  • THREE DIMENSIONAL GEOMETRY

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|194 Videos

Similar Questions

Explore conceptually related problems

In an experiment with 15 observations on x, the following results were available sum x^(2) = 2830, sum x = 170 One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :

Let x_(1), x_(2), ……., x_(n) be n observations such that sum x_(i)^(2) = 400 and sum x_(i) = 80 . Then a possible value of n among the following is :

Evaluate the following definite integrals as limit of sums. int_(2)^(3)x^(2)dx

Which of the following sets are empty sets? Justify your answer. (i) A={x : x^(2)=4 and 3x=9} (ii) The set of all triangles in a plane having the sum of their three angles less than 180.

For a bivariate distribution (X, Y), if sum x = 50, sum y = 60, sum xy = 350, bar(X) = 5, bar(Y) = 6 , Variance of x is 4, variance of y is 9, then r_(xy) equals :

What is the sum of the roots of the equations px^(2) =x-5 ?

Evaluate the following definite integrals as limit of sums. int_(0)^(5)(x+1)dx

Sum X + Y = ?

Evaluate the following definite integrals as limit of sums. int_(-1)^(1)e^(x)dx

HIMALAYA PUBLICATION-STATISTICS MEASURE OF DIPERSION-QUESTION BANK
  1. Let x(1), x(2),….., x(n) be n observations and x be their arithmetic m...

    Text Solution

    |

  2. The mean of 100 observations is 50 and their standard deviation is 5. ...

    Text Solution

    |

  3. Let a, b, c, d, e be the observations with mean m and standard deviati...

    Text Solution

    |

  4. Let x(1), x(2), ….., x(n) be n observations. Let w(i) = lx(i) + k for ...

    Text Solution

    |

  5. Let x(1), x(2), x(3), x(4), x(5) be the observations with mean m and s...

    Text Solution

    |

  6. Standard deviations for first 10 natural numbers is :

    Text Solution

    |

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

    Text Solution

    |

  8. The following information relates to a sample of size 60 : sum x^(2) =...

    Text Solution

    |

  9. Coefficients of variation of two distributions are 50 and 60, and thei...

    Text Solution

    |

  10. The standard deviation of some temperature data in overset C is 5. If...

    Text Solution

    |

  11. In an experiment with 15 observations on x, the following results were...

    Text Solution

    |

  12. In a series of 2n observations, half of them equal to a and remaining ...

    Text Solution

    |

  13. Suppose a population A has 100 observations 101, 102, …., 200 and anot...

    Text Solution

    |

  14. If the mean deviation of the numbers : 1, 1 + d, 1 + 2d, ….., 1 + 100d...

    Text Solution

    |

  15. For two data sets, each of size 5, the variances are given to be 4 and...

    Text Solution

    |

  16. The sum of the squares of deviations for 10 observations taken from th...

    Text Solution

    |

  17. The measure of dispersion is

    Text Solution

    |

  18. The S.D. of 5 scores 1, 2, 3, 4, 5 is :

    Text Solution

    |

  19. The variance of the first n natural numbers is :

    Text Solution

    |

  20. A batsman scores runs in 10 innings as 38, 70, 48, 34, 42, 55, 63, 46,...

    Text Solution

    |