Consider the following frequency distribution: Class 0-5 6-11 12-17 18-23 24-29 Frequency 13 10 15 8 11 The upper limit of the median class is (A) 17              (B) 17.5                       (C) 18              (D) 18.5

Frequency distribution: It tells how frequencies are distributed over values in a frequency distribution. However mostly we use frequency distribution to summarize categorical variables.
Class in not continuous. So we have to make 1t continuous first.

 Class Frequency Cumulative Frequency 0-5.5 13 13 5.5-11.5 10 (13+10=23) 11.5-17.5 15 (23+15=38) 17.5-23.5 8 (38+8=46) 23.5-29.5 11 (46+11=57) N = 57

$\frac{N}{2}= \frac{57}{2}= 28\cdot 5$
Here the median class is 15.5 – 17.5
upper limit of median class is 17.5