Question

Given below are the ages of 45 people in a colony.

33	8	7	25	31	26	5	20	25	48	56
33	28	22	15	62	59	16	14	19	24	35
26	9	12	46	15	42	63	32	5	22	11
42	23	52	48	62	10	24	43	51	37	48
36

Construct group frequency distribution for the given data with 6 class intervals.

Answer 1

$\Rightarrow$ Maximum value $=63$

$\Rightarrow$ Minimum value $=5$

$\Rightarrow$ Range $=63-5=58$

$\Rightarrow$ The number of class interval $=6$

$\Rightarrow$ Length of class interval $=\frac{58}{6}=9.6\approx 10$

$Class-Interval$	$Frequency$
$0-9$	$5$
$10-19$	$8$
$20-29$	$11$
$30-39$	$7$
$40-49$	$7$
$50-59$	$4$
$60-69$	$3$
$Total$	$45$