Home
Class 12
MATHS
The variance of 20 observations is 5 . I...

The variance of 20 observations is 5 . If eech observation is multiplied by 2 then the new variance of the resulting observations, is:

Text Solution

Verified by Experts

The correct Answer is:
20
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    CENGAGE|Exercise Comprehension|2 Videos

  • PROBABILITY I

    CENGAGE|Exercise JEE Advanced Previous Year|7 Videos

Similar Questions

Explore conceptually related problems

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

The standard deviation of 20 observations is sqrt(5) . If each observation is multiplied by 2 , find the standard deviation and variance of the resulting observations.

The standard deviation of a data is 5. If each value is multiplied by 2, then the new variance is

The standard deviation of a data is 3 . If each value is multiplled by 5 then the new variance is

The mean and standard deviation of six observations are 8 and 4, respectively. If each observation is multiplied by 3, find the new mean and new standard deviation of the resulting observations

The mean of 100 observations is 50. If one of the observation which was 50 is replaced by 150 then what will be the resulting mean ?

If each observation of a raw data whose variance is sigma is multiplied by h, then the variance of the new set is

The standard deviation of a collection data is 5sqrt(5) .If each value is multiplied by 3 then the new variance of the new data is ………….

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

CENGAGE-PROBABILITY AND STATISTICS-Question Bank
  1. A 2 xx 2 matrix is formed with entries from the set 0,1. The probebili...

    Text Solution

    |

  2. Two boys A and B find the jumble of n ropes lying on the floor. Each t...

    Text Solution

    |

  3. On a normal standard dic one of the 21 dots from any one of the six fa...

    Text Solution

    |

  4. Miss C has either Tea or Coffee at moming break. If she has tea one mo...

    Text Solution

    |

  5. A bowl hes 6 red marbles and 3 green marbles. The probebility that a b...

    Text Solution

    |

  6. Lot A consists of 3 G and 2 D articles. Lot B consists of 4 G and 1 D ...

    Text Solution

    |

  7. Let A and B are cvents of an experiment of P(A)=1/4, P(A uu B)=1/2 the...

    Text Solution

    |

  8. The probability that a positive two digit number selected at random ha...

    Text Solution

    |

  9. If the papers of 4 students randomly đistributed for checking among 7 ...

    Text Solution

    |

  10. A six faced fair dice is thrown until 2 comes, then the probability th...

    Text Solution

    |

  11. If a variable takes the discrete values p+4, p-7/2, p-5/2, p-3, p-2, p...

    Text Solution

    |

  12. The variance of 20 observations is 5 . If eech observation is multipli...

    Text Solution

    |

  13. The mean weight of 9 items is 15 . If one more item is added to the se...

    Text Solution

    |

  14. Consider the frequency distribution of the given pumber If mean of the...

    Text Solution

    |

  15. x1, x2 …. x(34) are numbers such that xi=xi+1-150 forall i in1,2,3, .....

    Text Solution

    |

  16. The mean of 5 observations is 4 and their variancé is 52 . If three of...

    Text Solution

    |

  17. If x1, x2, .. x18 are observations sach the underset(j =1)overset(18)...

    Text Solution

    |

  18. Two cards are drawn without replacement from a wellshuffled deck of 52...

    Text Solution

    |

  19. Let x1, x2 ... xn be n observations sach that sum xi^2=200 and sum xi=...

    Text Solution

    |

  20. If in a frequency distribution, the mean and median are 25 and 26 , th...

    Text Solution

    |