The sum of squares of deviations for 10 obser | vedclass

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Question

(b) ${\rm{S}}{\rm{.D}}{\rm{.}}$

$(\sigma ) = \sqrt {\frac{{250}}{{10}}} = \sqrt {25} = 5$

Hence, coefficient of variation $ = \frac{\sigma }{{{\

Vedclass · Accepted Answer

$10$

Vedclass · Answer

(b) ${m{S}}{m{.D}}{m{.}}$

$(\sigma ) = \sqrt {\frac{{250}}{{10}}} = \sqrt {25} = 5$

Hence, coefficient of variation $ = \frac{\sigma }{{{m{mean}}}} 	imes 100$

$ = \frac{5}{{50}} 	imes 100 = 10\%$.

Class	$10-20$	$20-30$	$30-40$
Frequency	$2$	$x$	$2$

${x_i}$	$6$	$10$	$14$	$18$	$24$	$28$	$30$
${f_i}$	$2$	$4$	$7$	$12$	$8$	$4$	$3$

The sum of squares of deviations for $10$ observations taken from mean $50$ is $250$. The co-efficient of variation is.....$\%$

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