Calculate the mean deviation about the mean for the following frequency distribution Class interval `0-4,4-8,8-12,12-16,16-20` Frequency `4,6,8,5,2`

Explanation

`((class),(0-4),(4-8),(8-12),(12-16),(16-20),(Total))`
`((x),(4),(6),(8),(5),(2),(25))`
`((f),(2),(6),(10),(14),(18))`
`((cf),(8),(36),(80),(70),(36),(230))`
`((d),(7.2),(3.2),(0.2),(4.8),(8.8))`
`((fd),(28.8),(19.2),(6.4),(24),(17.6),(96))`


Mean`=(230)/(25)=9.2`

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