Home
Class 12
MATHS
The outcome of each of 30 items was obse...

The outcome of each of 30 items was observed , 10 items gave an outcome `(1)/(2)-d` each, 10 items gave outcome `(1)/(2)` each and the remaining 10 items gave outcome `(1)/(2) +d` each. If the variance of this outcome data is `(4)/(3)`, then |d| equals

A

2

B

`(sqrt(5))/(2)`

C

`(2)/(3)`

D

`sqrt(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

For two data sets , each of size 5, the variances are given to be 4 and 5 and the correcponding means are given to be 2 and 4, respectively . The variance of the combined data set is

If the variance of 1,2,3,4,5,….., x is 10, then the value of x is

If each observation of a new data where variance is sigma^(2) increased by lambda , then the variance of the new data is

Find the mean and variance for each of the data in First 10 multiples of 3

Consider the first 10 positve integers .If we multiply each number by -1 and then add 1 to each number,the variance of the number so obtained

If each observation of a raw data whose variance sigma^(2) is multiplied by lambda , then the variance of the new set is

suppose X has a binomial distribution B( 6, (1)/(2) ) . Show that X = 3 is the most likely outcome.

Consider the numbers 1,2,3,4,5,6,7,8,9,10. If 1 is added to each number, the variance of the numbers so obtained is 6.5 (b) 2.87 (c) 3.87 (d) 2.87

Find the mean and variance for each of the data in 6, 7, 10, 12, 13, 4, 8, 12

A businessman bought some items for Rs. 600. Keeping 10 items for himself he sold the remaining items at a profit of Rs. 5 per item. From the amount received in this deal he could buy 15 more items. Find the original price of each item.

CENGAGE-JEE 2019-MCQ
  1. The mean of five observations is 5 and their variance is 9.20. If thr...

    Text Solution

    |

  2. The mean and standart deviation of five observations x1,x2,x3,x4,x5 an...

    Text Solution

    |

  3. The outcome of each of 30 items was observed , 10 items gave an outcom...

    Text Solution

    |

  4. Contrapositive of the statement ''If two numbers are not equal, then t...

    Text Solution

    |

  5. There are 30 white balls and 10 red balls in bag. 16 balls are drawn w...

    Text Solution

    |

  6. If the sum of the deviations of 50 observations from 30 is 50, then th...

    Text Solution

    |

  7. Mean and variance of five observations are 4 and 5.2 respectively. If ...

    Text Solution

    |

  8. The system of linear equations x + y + z = 2 2x + 3y + 2z = 5 2...

    Text Solution

    |

  9. If the system of linear equations x-4y+7z=g, 3y-5z=h, -2x+5y-9z=k is c...

    Text Solution

    |

  10. If the system fo equations x+y+z = 5 x + 2y + 3z = 9 x + 3y + a...

    Text Solution

    |

  11. Let a(1),a(2),a(3), …, a(10) be in G.P. with a(i) gt 0 for i=1, 2, …, ...

    Text Solution

    |

  12. If the system of linear equations 2x+2y+3z=a 3x-y+5z=b x-3y+2z=...

    Text Solution

    |

  13. prove that [ [a-b-c , 2a , 2a ] , [2b , b-c-a , 2b ] ,[2c ,2c,c-a-b]]=...

    Text Solution

    |

  14. An ordered pair (alpha, beta) for which the system of linear equations...

    Text Solution

    |

  15. The set of all values of lambda for which the system of linear equatio...

    Text Solution

    |

  16. If A = [(costheta,-sintheta),(sintheta,costheta)], then the matrix A^(...

    Text Solution

    |

  17. Matrix=[[e^t,e^-t(sint-2cost),e^-t(-2sint-cost)],[e^t,-e^-t(2sint+cost...

    Text Solution

    |

  18. Let d in R and A= ((-2,4+d, sintheta-2),(1, sintheta+2,d),(5, 2sinthet...

    Text Solution

    |

  19. Let A=[(2,b,1),(b,b^(2)+1,b),(1,b,2)] where b gt 0. Then the minimum v...

    Text Solution

    |

  20. Let A=[[0,2q,r] , [p,q,-r] , [p,-q,r]] If A A^T=I3 then |p|=

    Text Solution

    |