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For two data sets, each of size 5, the v...

For two data sets, each of size 5, the variances are given to be 4 and 5 and the corresponding means are given to be 2 and 4, respectively. The variance of the combined data set is (1) `(11)/2` (2) 2 (3) `(13)/2` (4) `5/2`

A

`5/2`

B

`11/2`

C

6

D

`13/2`

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

    A
    `5/2`
    B
    `(11)/(2)`
    C
    `6`
    D
    `(13)/(2)`

  • Two data sets each of size 10 has the variance as 4 and k and the corresponding means as 2 and 4 respectively. If the variance of the combined data set is 5.5, then the value of k is equal to

    A
    5
    B
    6
    C
    4
    D
    3

  • The mean and the variance of a binomial distribution are 4 and 2 respectively. Then, the probability of 2 successes is

    A
    `(28)/(256)`
    B
    `(219)/(256)`
    C
    `(128)/(256)`
    D
    `(37)/(256)`

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