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The following table gives the distributi...

The following table gives the distribution of the life time of 400 neon lamps: Lite time: (in hours)                     Number of lamps `1500-2000`                                    14 2000-2500                                    56 2500-3000                                    60 3000-3500                                    86 3500-4000                                    74 4000-4500                                    62 4500-5000                                    48 Find the median life.

Text Solution

Verified by Experts

Median class = `3000-3500`
`l=3000`
`h=500`
`cf=130`
`f=86`
Median=`l+((n/2)-cf)/86*500`
=`3000+(200-130)/86*500`
=` 3406.98 hours`
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