Correct option is D
Given:
Class Frequency
110-160 16
160-210 15
210-260 31
260-310 24
310-360 38
Formula Used:
Median =
Where:
L = Lower boundary of the median class
N = Total frequency
C = Cumulative frequency of the class before the median class
f = Frequency of the median class
h = Class width
Solution:
Class | Frequency | Cumulative Frequency |
110-160 | 16 | 16 |
160-210 | 15 | 31 |
210-260 | 31 | 62 |
260-310 | 24 | 86 |
310-360 | 38 | 124 |
N = 16 + 15 + 31 + 24 + 38 = 124
= = 62
This is the class 210-260, as the cumulative frequency is 62.
L = 210 (lower boundary of the median class)
N = 124
C = 31 (cumulative frequency before the median class)
f = 31 (frequency of the median class)
h = 50 (class width, calculated as 260 - 210)