The median of the following distribution is 30. Find the missing frequencies f1 and f2:
Class frequency
0-10 10
10-20 10
20-30 f1
30-40 30
40-50 f2
50-60 10
Total 100
class interval | frequency | cumulative frequency |
0-10 | 10 | 10 |
10-20 | 10 | 20 |
20-30 | ![]() | ![]() |
30-40 | 30 | ![]() |
40-50 | ![]() | ![]() |
50-60 | 10 | ![]() |
total | 100 |
therefore
given: median = 30
therefore modal class = 30-40
from eq(1):
thus missing frequencies
hope this helps you.
cheers!!