1.

Find the median for the following frequency distribution:

Answer»

Solution : First we will convert the givendata in EXCLUSIVE from :

Here,
N=400
`rArr"" (N)/(2)=(400)/(2)=200`
`rArr` Median class is 165.5-168.5
Now, `l_(1)=165.5l_(2),=168.5,i=168.5-165.5=3,f=136,C=132`
and median `:. M=l_(1)+(((N)/(2)-C))/(f)xxi`
`=165.5+((200-132))/(136)xx3`
`=165.5+(3xx68)/(136)=167`


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