28
While calculating mean of a grouped frequency distribution, step deviation method was used ($\frac{x-a}{h}=u$). It was found that $\bar{x} = 64$, $h = 5$ and $a = 62.5$. The value of $u$ is
- (a)$0.5$
- (b)$1.5$
- (c)$0.3$
- (d)$7.5$
Show SolutionHide Solution↓
Sol. (C) $0.3$ (1 Mark)