Question

Find the approximate mean number of animals inside the farm using step deviation method.

• A. $11$
• B. $14$
• C. $17$
• D. $19$

Answer 1

The correct option is B $14$

Answer:-

Class interval width (i) = 4

Farms X	No. of animals F	$u=\frac{X-A}{i}$	Fu
6	2	-2	-4
10	4	-1	-4
14 = A	6	0	0
18	8	1	8
	$\Sigma f=20$		$\Sigma fu=0$

By using step deviation method

Mean = $A+\frac{\Sigma fu}{\Sigma f}=14+\frac{0}{20}\times 4=14+0=14$

B) 14 animals