For finding mean by assumed mean method

$¯ ¯ ¯ x$ = a + $\frac{(\sum f \times d)}{\sum f}$

Where d and a are respectively

Assumed frequency , difference between class mark and assumed mean

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Difference between class mark and assumed mean, assumed frequency

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Difference between class mark and assumed frequency , assumed mean

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Difference between class mark and assumed mean , assumed mean

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Solution

The correct option is D
Difference between class mark and assumed mean , assumed mean

In assumed mean method , $¯ ¯ ¯ x$ = a + $\frac{(\sum f \times d)}{\sum f}$

where ,

a is the assumed mean

d is the deviation from assumed mean ie $x_{i}$ -a

f is the frequency

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Similar questions

Find the mean marks per student, using assumed-mean method:
$\begin{matrix} Marks & 0 - 10 & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 Number of students & 12 & 18 & 27 & 20 & 17 & 6 \end{matrix}$

For finding mean by assumed mean method

$¯ ¯ ¯ x$ = a + $\frac{(\sum f \times d)}{\sum f}$

Where d and a are respectively

Q. Deviation = Class mark - assumed mean

Q. The marks scored by 5 students in a class are 25, 30, 35, 40 and 45. Find the standard deviation using Assumed mean method.

d_{i}

is the deviation of a class mark

y_{i}

from ‘a’ the assumed mean and

f_{i}

is the frequency, if

M_{g} = x + \frac{1}{\sum f_{i}} (\sum f_{i} d_{i})

, then x is

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For finding mean by assumed mean method ¯¯¯x = a + (∑f×d)∑f Where d and a are respectively

The correct option is D Difference between class mark and assumed mean , assumed mean In assumed mean method , ¯¯¯x = a + (∑f×d)∑f where , a is the assumed mean d is the deviation from assumed mean ie xi -a f is the frequency

For finding mean by assumed mean method

$¯ ¯ ¯ x$ = a + $\frac{(\sum f \times d)}{\sum f}$

Where d and a are respectively

The correct option is D
Difference between class mark and assumed mean , assumed mean

In assumed mean method , $¯ ¯ ¯ x$ = a + $\frac{(\sum f \times d)}{\sum f}$

where ,

a is the assumed mean

d is the deviation from assumed mean ie $x_{i}$ -a

f is the frequency