Question:
consider the data.
The difference of the upper limit of the median class and the lower limit of the modal class is
(a) 0
(b) 19
(c) 20
(d) 38
Solution:
Here, $\frac{N}{2}=\frac{67}{2}=33.5$ which lies in the interval $125-145$.
Hence, upper limit of median class is 145.
ere, we see that the highest frequency is 20 which lies in 125-145. Hence, the lower limit of modal class is 125.
Required difference = Upper limit of median class – Lower limit of modal class
= 145-125 = 20