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Mean of n observations x(1),x(2),..........

Mean of n observations `x_(1),x_(2),.......,x_(n)` is `bar(x)`. If an observation `x_(q)`' then the new mean is

A

`bar(x)-x_(q)+x_(q)'`

B

`((n-1)bar(x)+x_(q)')/(n)`

C

`((n-1)bar(x)-x_(q)')/(n)`

D

`(barnx-x_(q)+x_(q)')/(n)`

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • The mean of discrete observation y_1, y_2,…y_n is given by

    A
    `sum_(i=1)^n(y_i)/(n)`
    B
    `(sum_(i=1)^ny_i)/(sum_(i=1)^ni`
    C
    `(sum_(i=1)^ny_i f_1)/n`
    D
    `(sum_(i=1)^ny_i f_1)/(sum_(i=1)^nf_1`

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