Home
Class 11
MATHS
Let a, b, c, d, e, be the observations w...

Let a, b, c, d, e, be the observations with m and standard deviation s. The standard deviation of the observations a+k, b+k, c+k, d+k, e+k is (a) `s` (b) `k s` (c) `s+k` (d) `s/k`

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

Let a, b, c, d, e, be the observations with mean m and standard deviation s. The standard deviation of the observations a+k, b+k, c+k, d+k, e+k is (a) s (b) k s (c) s+k (d) s/k

Let a, b, c, d, e, be the observations with m and standard deviation s. The standard deviation of the observations a+k, b+k, c+k, d+k, e+k is s (b) k s (c) s+k (d) s/k

The mean of 40 observations 20 and their standard deviation is 5. If the sum of the square of the observations k, then the value of (k)/(1000) is

The mean of n observations is X dot If each observation is multiplied by k , the mean of new observation is k X (b) ( X )/k (c) X +k (d) X -k

A set of n values x_(1),x_(2),…….,x_(n) has standard deviation sigma . The standard deviation of n values x_(1)-k,x_(2)-k,…….,x_(n)-k is

The mean of n observations is xdot If k is added to each observation, then the new mean is X (b) X +k (c) X -k (d) k X

Let s be the standard deviation of n observations. Each of the n observations is multiplied by a constant c. Then the standard deviation of the resulting number is

In a series of 20 observations, 10 observation each equal to k and each of the remaining half is equal to -k . If the standard deviation of the observations is 2, then write the value of k .

If A=[a b c d] (where b c!=0 ) satisfies the equations x^2+k=0,t h e n a+d=0 b. K=-|A| c. k=|A| d. none of these

If c ,d are the roots of the equation (x-a)(x-b)-k=0 , prove that a, b are roots of the equation (x-c)(x-d)+k=0.

RD SHARMA ENGLISH-STATISTICS-All Questions
  1. If the standard deviation of a variable X \ is \ sigma , then standard...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  15. The following table gives the distribution of income of 100 families i...

    Text Solution

    |

  16. Calculate the mean and standard deviation for the following table give...

    Text Solution

    |

  17. The measurements of the diameters (in mm) of the heads of 107 screws ...

    Text Solution

    |

  18. The mean deviation of the numbers 3, 4, 5, 6, 7 from the mean i...

    Text Solution

    |

  19. A batsman scores run in 10 innings as 38,70,48,34,42,55,63,46,54 and ...

    Text Solution

    |

  20. The mean deviation of the series a , a+d , a+2d ,.....,a+2n from its m...

    Text Solution

    |