What is the median class for the following data?
X
5-10
10-15
15-20
20-25
25-30
frequency
2
4
5
2
7

5 - 10

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20 - 25

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25 - 30

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15 - 20

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Solution

The correct option is D $15 - 20$
To find the median class:
First add the total number of frequencies.
Here, $f = 20$

$=$ $\frac{T o t a l n u m b e r o f f r e q u e n c y}{2}$

So, Median class $=$ $\frac{20}{2} = 10$

Hence, the value $10$ lies in the class interval $15 - 20$ from the cumulative frequency table.

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Similar questions

Class-interval:	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Frequency:	$5$	$8$	$7$	$12$	$28$	$20$	$10$	$10$

Class-interval:	10-15	15-20	20-25	25-30	30-35	35-40
Frequency:	$30$	$45$	$75$	$35$	$25$	$15$

Class-interval:	25-30	30-35	35-40	40-45	45-50	50-60
Frequency:	$25$	$34$	$50$	$42$	$38$	$14$

Class- interval	0 - 5	5 - 10	10 - 15	15 - 20	20 - 25	25 - 30
frequency	5	3	9	10	8	5

Class	5-10	10-15	15-20	20-25	25-30
Frequency	4	7	10	9	4

Class:	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$	$40 - 45$
Frequency:	$5$	$6$	$15$	$10$	$5$	$4$	$2$	$2$

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