Question

Find the mean daily wages

Daily wages	No. of workers
$100-120$	$12$
$120-140$	$14$
$140-160$	$8$
$160-180$	$6$
$180-200$	$10$

Use appropriate method.

• A. $150$
• B. $150.5$
• C. $145.2$
• D. $146$

Answer 1

The correct option is C $145.2$

$Dailywages$	$No.ofworker$ $f_i$	$Class-Mark$ $x_i$	$f_i{x}_i$
$100-120$	$12$	$110$	$1320$
$120-140$	$14$	$130$	$1820$
$140-160$	$8$	$150$	$1200$
$160-180$	$6$	$170$	$1020$
$180-200$	$10$	$190$	$1900$
	$\sum f_i=50$		$\sum f_i{x}_i=7260$

$\overline{x}=\frac{\sum f_i{x}_i}{\sum f_i}$

$=\frac{7260}{50}$

$=145.2$