X-a-fd-N is the formula of

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Standard X

Mathematics

Assumed Mean Method of Finding Mean

x=a+Σfd/N is ...

Question

$x = a + \frac{Σ f d}{N}$ is the formula of

Median

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Mode

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Arithmetic mean

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Mean deviation

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Solution

The correct option is C Arithmetic mean
The given formula is to determine Arithmetic mean using assumed mean method, where $a$ is the assumed mean.

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Similar questions

Q. Let

x_{1}, x_{2}, . . . . . x_{n}

n

observations and

¯ ¯¯¯ ¯ X

be their arithmetic mean. The formula for the standard deviation is given by

Q. Let

x_{1}, x_{2}, . . . . . x_{n}

n

observations with mean

m

and standard deviation

s

. Then the standard deviation of the observations

a x_{1}, a x_{2}, . . . . . a x_{n}

, is

Show that the two formulae for the standard deviation of ungrouped data .

$σ = \sqrt{\frac{1}{n} \sum (x_{i} - ¯ ¯¯¯ ¯ X)^{2}} a n d σ^{'} = \sqrt{\frac{1}{n} \sum x_{i}^{2} - {¯ ¯¯¯ ¯ X}^{2}}$ are equivalent , where $¯ ¯¯¯ ¯ X = \frac{1}{n} \sum x_{i}$

Q. Show that the two formulae for the standard deviation of ungrouped data

σ = \sqrt{\frac{1}{n} \underset{}{\sum {(x_{i} - X)}^{2}}}

and

σ' = \sqrt{\frac{1}{n} \underset{}{\sum x_{i}^{2} - X^{2}}}

are equivalent, where

X = \frac{1}{n} \sum_{} x_{i}

PQ. Show that the two formulae for the standard deviation of ungrouped data $δ = \sqrt{\frac{1}{n} \sum (x_{i} - ¯ X)^{2}}$ and $δ = \sqrt{\frac{1}{n} \sum (x_{i} - ¯ X)^{2}}$ are equivalent, wehere $¯ X = \frac{1}{n} \sum x_{i}$ .

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x=a+ΣfdN is the formula of

The correct option is C Arithmetic meanThe given formula is to determine Arithmetic mean using assumed mean method, where a is the assumed mean.

$x = a + \frac{Σ f d}{N}$ is the formula of

The correct option is C Arithmetic mean
The given formula is to determine Arithmetic mean using assumed mean method, where $a$ is the assumed mean.