Question

Draw histogram, frequency curve and frequency polygon for the data given below

Class intervals	$5-10$	$10-15$	$15-20$	$20-25$	$25-30$
Frequency	$4$	$6$	$3$	$2$	$1$

Answer 1

$Class-interval$	$Class-mark$	$Frequency$
$0-5$	$2.5$	$0$
$5-10$	$7.5$	$4$
$10-15$	$12.5$	$6$
$15-20$	$17.5$	$3$
$20-25$	$22.5$	$2$
$25-30$	$27.5$	$1$
$30-35$	$32.5$	$0$

$\Rightarrow$ In above figure we have draw histogram.

$\Rightarrow$ By using histogram we have draw frequency polygon and frequency curve.

$\Rightarrow$ Frequency polygon is drawn by joining points by a straight line.

$\Rightarrow$ Frequency curve is drawn by a smooth hand.