Question

calculate median from the following data
weight 40 50 60 70 80 90
no of persons 3 17 24 16 8 2​

Answer 1

Answer:

Marks (x)  No. of students (f)  C.F.

0-10 15 15

10-20 20 35

20-30 25 60

30-40 24 84

40-50 12 96

50-60 31 127

60-70 71 198

70-80 52 250

 N = 250  

As, N=250⇒  

2

N

​  

=  

2

250

​  

=125

As 127 is just greater than 125, therefore median class is 50−60.

Median=l+  

f

2

N

​  

+C

​  

×h

Here, l=lower limit of median class =50

C=C.F. of the class preceding the median class =96

h= higher limit - lower limit =60−50=10

f= frequency of median class =31

∴median=50+  

31

125−96

​  

×10=50+9.35=59.35Explanation: