47
While calculating mean of a grouped frequency distribution using step deviation method $u = \frac{x-a}{h}$ it was found that $\bar{x} = 62$, $a = 47.5$, $h = 5$. The value of $\bar{u}$ is:
- (a)$3$
- (b)$2.9$
- (c)$14.5$
- (d)$3.1$
Show SolutionHide Solution↓
Answer: (C) $2.9$