Home
Class 12
MATHS
M.D for the observations a,a +d,a +2d, …...

M.D for the observations a,a +d,a +2d, ……., a +2nd is

A

`n(n+1)d`

B

`(n(n+1)d)/(2n+1)`

C

`(n(n+1)d)/(2n)`

D

`(n(n-1)d)/(2n+1)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|40 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

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

Mean and variance of five observations are 4 and 5.2 respectively. If three of these observations are 3, 4, 4 then find absolute difference between the other two observations (A) 3 (B) 7 (C) 2 (D) 5

If the mean deviation of number 1,1+d, 1+2d,…., 1+100d from their mean is 255, then d is equal to

For the arithmetic progression a,(a+d),(a+2d),(a+3d),......,(a+2nd) , the mean deviation from mean is

let a > 0 , d > 0 find the value of the determinant |[1/a,1/(a(a + d)),1/( (a + d) (a +2d))],[1/(a+ d),1/( (a+ d) (a + 2d)), 1/((a+2d) (a + 3d))],[1/(a +2d), 1/((a + 2d) (a +3d)), 1/((a+3d) (a + 4d))]|

The numbers of the form a, a+d, a+2d, a+3d_______ is said to form___.

A line meets the coordinate axes at A and B . A circle is circumscribed about the triangle O A Bdot If d_1a n dd_2 are distances of the tangents to the circle at the origin O from the points Aa n dB , respectively, then the diameter of the circle is (2d_1+d_2)/2 (b) (d_1+2d_2)/2 d_1+d_2 (d) (d_1d_2)/(d_1+d_2)

If the segments joining the points A(a , b)a n d\ B(c , d) subtends an angle theta at the origin, prove that : costheta=(a c+b d)/sqrt((a^2+b^2)(c^2+d^2))

The sum of the series a-(a+d)+(a+2d)-(a+3d)+ up to (2n+1) terms is- a. -n d . b. a+2n d . c. a+n d . d. 2n d

Let A D be a median of the A B Cdot If A Ea n dA F are medians of the triangle A B Da n dA D C , respectively, and A D=m_1,A E=m_2,A F=m_3, then (a^2)/8 is equal to (a) m_2^2+m_3^2-2m_1^2 (b) m_1^2+m_2^2-2m_3^2 (c) m_1^2+m_3^2-2m_2^2 (d) none of these

NEW JOYTHI PUBLICATION-STATISTICS-EXSERCISE
  1. If the S.D of 0,1,2,….9 is a, then the S.D of 10,11,12,…. 19 is

    Text Solution

    |

  2. The mode of the obeservations 3,5,1,7,9,1,12 is

    Text Solution

    |

  3. The AM of 1,2,4,8 …… 2^(n) is

    Text Solution

    |

  4. If a variable takes the values 0,1,2,…. N with frequencies 1,""^(n)C(1...

    Text Solution

    |

  5. The GM of 2, 2^(2),2^(3).......2^(n) is

    Text Solution

    |

  6. The mean mark in statistics of 100 students in a class was 72. The mea...

    Text Solution

    |

  7. The AM of the nnumbers x(1),x(2)......x(n) is M. If x(1) is replaced b...

    Text Solution

    |

  8. The MD from the median for the observed values -1,0,4 is

    Text Solution

    |

  9. If each observation of a raw data whose variance sigma^(2) is multipli...

    Text Solution

    |

  10. If each observation of a new data where variance is sigma^(2) increas...

    Text Solution

    |

  11. M.D for the observations a,a +d,a +2d, ……., a +2nd is

    Text Solution

    |

  12. The sum of squares of deviations of 10 observations taken from the mea...

    Text Solution

    |

  13. The median and S.D of a distribution are 20 and 4 respectively . If ea...

    Text Solution

    |

  14. If the S.D of a variate x is sigma , then the S.D of (ax+b)/(c ) where...

    Text Solution

    |

  15. If the S.D of x(1),x(2),x(3),........x(n) is 6, then the S.D of -x(1),...

    Text Solution

    |

  16. The S.D for the set of the first 'n' natural numbers is

    Text Solution

    |

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

    Text Solution

    |

  18. The standard deviation of 3,7,11,15,19,23,27,31,35,39 is

    Text Solution

    |

  19. The variance of the population of the observation 100,101,102,103,99 i...

    Text Solution

    |

  20. The mean deviation of the first 19 natural numbers about the median is

    Text Solution

    |