Home
Class 11
MATHS
For a frequency distribution standard de...

For a frequency distribution standard deviation is computed by applying the formula (a) `sigma=sqrt((sumfd^2)/(sumf)-((sumfd)/(sumf))^2)` (b) `sigma=sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))` (c) `sigma=sqrt((sumfd^2)/(sumf)-(sumfd)/(sumf))` (d) `sigma=sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))`

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

For a frequency distribution standard deviation is computed by applying the formula (a) sigma=sqrt((sumfd^2)/(sumf)-((sumfd)/(sumf))^2) (b) sigma=sqrt(((sumfd^2)/(sumf))-(sumfd^2)/(sumf)) (c) sigma=sqrt((sumfd^2)/(sumf)-(sumfd)/(sumf)) (d) sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))

For a frequency distribution mean deviation from mean in computed by: (a) MdotDdot = (sumf)/(sumf|d|) (b) MdotDdot=(sumd)/(sumf) (c) MdotDdot=(sumfd)/(sumf) (d) MdotDdot=(sumf|d|)/(sumf)

For a frequency distribution mean deviation from mean in computed by (a) MdotDdot=(sumf)/(sumf|d|) (b) MdotDdot=(sumd)/(sumf) (c) MdotDdot=(sumfd)/(sumf) (d) MdotDdot=(sumf|d|)/(sumf)

The standard deviation of first 11 nutural numbers is (i) 2 (ii) 2sqrt2 (iii) 3 (iv) sqrt10

If the mean of a frequency distribution is 8.1 and sumf_i x_i=132+5k ,\ \ sumf_i=20 , then k= (a) 3 (b) 4 (c) 5 (d) 6

The mean of a discrete frequency distribution x_i//f_i ; i=1,\ 2,\ ddot,\ n is given by (a) (sumf_i x_i)/(sumf_i) (b) 1/n\ sum_(i=1)^nf_i x_i (c) (sumi=1nf_i x_i)/(sumi=1n x_i) (d) (sumi=1nf_i x_i)/(sumi=1n i)

Show that the two formulae for the standard deviation of ungrouped data: sigma=sqrt(1/nsum(x_i- barX )^2) a n d\ sigma^(prime)=sqrt(1/nsumx_i^2- barX ^2) are equivalent where barX =1/nsumx_i .

If standard deviation of 1,2,3,4,….,10 is sigma then standard deviation of 11, 12, …20 is

Compute the following: sqrt(-25)+3sqrt(-4)+2sqrt(-9)

Is the following computation correct? If not give the correct computation : sqrt((-2))sqrt((-3))=sqrt((-2)(-3))=sqrt((-6))

RD SHARMA ENGLISH-STATISTICS-All Questions
  1. Calculate the mean and standard deviation for the following distrib...

    Text Solution

    |

  2. Let x1, x2, ,xn be xn observations. Let yi=a xi+b for i=1,2,...,n wher...

    Text Solution

    |

  3. For a frequency distribution standard deviation is computed by applyin...

    Text Solution

    |

  4. The mean of 100 numbers observations is 50 and their standards devia...

    Text Solution

    |

  5. If n=10 , X =12 and sumx(i)^2=1530 , then the coefficient of variati...

    Text Solution

    |

  6. Life of bulbs produced by two factories A and B are given below: Le...

    Text Solution

    |

  7. If the standard deviation of a variable X \ is \ sigma , then standard...

    Text Solution

    |

  8. Following are the marks obtained, out of 100, by two students Ravi and...

    Text Solution

    |

  9. Let a, b, c, d, e, be the observations with m and standard deviation s...

    Text Solution

    |

  10. The lengths (in cm) of 10 rods in a shop are given below: 40.0,52.3,55...

    Text Solution

    |

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

    Text Solution

    |

  12. The standard deviation of the observations 6,5,9,13,12,8,10 is 6 (b) ...

    Text Solution

    |

  13. The standard deviation of first 10 natural numbers is ...

    Text Solution

    |

  14. The mean deviation of the data 3,10,10,4,7,10,5 (a) 2 (b) 2.57(c)3 (d)...

    Text Solution

    |

  15. The mean deviation from e median is (a) equal to that measured from an...

    Text Solution

    |

  16. The weight of coffee in 70 jars is shown in the following table: We...

    Text Solution

    |

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

    Text Solution

    |

  18. While calculating eh mean and variance of 10 readings, a student wr...

    Text Solution

    |

  19. Mean  and standard deviation of 100 observations were found to be 4...

    Text Solution

    |

  20. Calculate the mean and standard deviation for the following data: W...

    Text Solution

    |