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Statistics — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsStatistics2 Marks
Question
Write the median class for the following frequency distribution:
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
✓

Answer

We are given the following table.
Class interval
Frequency
Cumulative Frequency
0-10
5
5
10-20
8
13
20-30
7
20
30-40
12
32
40-50
28
60
50-60
20
80
60-70
10
90
70-80
10
100
 
N = 100
  
Here, N = 100
$\therefore\frac{\text{N}}{2}=50$
The cumulative frequency just greater than 50 is 60.

So, the median class is 40−50.

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