Question

For finding mean by assumed mean method

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

Where d and a are respectively

• A. Assumed frequency , difference between class mark and assumed mean
• B. Difference between class mark and assumed mean, assumed frequency
• C. Difference between class mark and assumed frequency , assumed mean
• D. Difference between class mark and assumed mean , assumed mean

Answer 1

The correct option is D

Difference between class mark and assumed mean , assumed mean

In assumed mean method , $\overline{x}$ = 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