Home
Class 12
MATHS
Variance (sigma^(2)) and the coefficien...

Variance `(sigma^(2))` and the coefficient of variation (CV) of two distributions are given below.

(i) Compute the standard deviations of the given distributions.
(ii) What are their means?

Text Solution

Verified by Experts

The correct Answer is:
`=22.857`
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    NEW JOYTHI PUBLICATION|Exercise EXSERCISE|34 Videos
  • STATISTICS

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|40 Videos
  • SETS

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|21 Videos
  • STRAIGHT LINES

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|122 Videos

Similar Questions

Explore conceptually related problems

Find the mean , variance and standard deviation for the frequency distribution.

Coefficient of variation of two distributions are 60 and 70, and their standard deviations are 21 and 16, respectively. What are their arithmetic means.

The diameter of circles (in mm) drawn in a design are given below. Calculate the standard deviation.

The rainfall recorded in various places of five districts in a week are given below. Find its standard deviation.

If the mean and coefficient of variation of a data are 15 and 48 respectively, then find the value of standard deviation.

If the coefficient of variation of a collection of data is 57 and its standard deviation is 6.84 , then find the mean.

If the mean and coefficient of variation of a data are 4 and 87.5 % then the standard deviation is

Coefficients of variation of two distributions are 50 and 60, and their arithmetic means are 30 and 25, respectively. Difference of their standard deviations is

Find the binomial distribution whose mean is 10 and standard deviation is 2sqrt(2)

The measurements of the diameters (in cm) of the plates prepared in a factory are given below. Find its standard deviation.

NEW JOYTHI PUBLICATION-STATISTICS-QUESTIONS FROM COMPETITIVE EXAMS
  1. Variance (sigma^(2)) and the coefficient of variation (CV) of two dis...

    Text Solution

    |

  2. The mean mark in Statistics of 100 students in a class was 72 .The mea...

    Text Solution

    |

  3. If the mean of numbers 27+x,156+x " is "82, then the mean of 130 +x,1...

    Text Solution

    |

  4. If mu us the mean of distribution {y(1),f(1)}, then sumf(1)(i(1)-mu) ...

    Text Solution

    |

  5. A batsman score runs in 10 innings 38,70,48,34,42,55,63,46,54 and 44. ...

    Text Solution

    |

  6. The average weight of students in a class of 35 students is 40 kgs . I...

    Text Solution

    |

  7. Standard deviation of the first 2n+1 natural numbers is equal to

    Text Solution

    |

  8. Mean marks scored by the students of a class is 53. The mean mark of t...

    Text Solution

    |

  9. The average monthly salary of workers in a factory is Rs.206 . If the ...

    Text Solution

    |

  10. For the arithmetic progression a,(a+d),(a+2d),(a+3d),......,(a+2nd), t...

    Text Solution

    |

  11. The standard deviation of n obervations x(1),x(2).....,x(n) is 2. If s...

    Text Solution

    |

  12. The standard deviation of the numbers 31,32,33, ……., 46,47 is

    Text Solution

    |

  13. The standard deviation for the scores 1,2,3,4,5,6, and 77 is 2. Then ...

    Text Solution

    |

  14. If the variance of 1,2,3,4,5 , …., 10 is (99)/(12), then the standard ...

    Text Solution

    |

  15. If ""^(n)C(8)=""^(n)C(2), find ""^(n)C(2).

    Text Solution

    |

  16. The arithmetic mean of 7 consecutive integers starting with 'a' is m. ...

    Text Solution

    |

  17. The mean and variance of n observations x(1),x(2),x(3),...x(n) are 5 a...

    Text Solution

    |

  18. If the standard deviation of 3,8,6,10,12,9,11,10,12,7 is 2.71 , then t...

    Text Solution

    |

  19. The A.M of 9 terms is 15. If one more term is added to this series , ...

    Text Solution

    |

  20. If the average of the numbers 1,2,3,…., 98,99,x is 100x, then the valu...

    Text Solution

    |

  21. If the median of (x)/(5),x,(x)/(4),(x)/(2),(x)/(3)(xgt0) is 8, then t...

    Text Solution

    |