Find the mean deviation about median for the following data : Marks           0-10      10-20     20-30        30-40     40-50      50-60 Number of      6             8            14             16           4              2 Girls

Explanation

`((Marks),(0-10),(10-20),(10-20),(20-30),(30-40),(40-50))`
`((no of girls),(6),(8),(14),(16),(4),(2),(50))`
`((cf),(6),(14),(28),(44),(48),(50))`
`((x),(5),(15),(25),(35),(45),(55))`
`((x-m),(22.85),(12.85),(2.85),(7.15),(17.15),(27.15))`
`((f(x_i-m)),(137),(102.8),(39.9),(114.4),(68.6),(54.3),(517.1))`

Median:--

`= (l + (N/2 - C))/f' × h`

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