Find the mean for the following data

Explanation

First of all, we make the data continuous , So

`therefore barx=(Sigmaf_ix_i)/(Sigmaf_i)=4350/100`=43.5
`therefore` Mean deviation about mean =M.D.`(barx)=(Sigmaf_i|x_i-barx|)/(Sigmaf_i)=482/100=4.82`
Variance =`sigma^2=(Sigmaf_i(x_i-barx)^2)/N`
`=3084/100`=30.84
Standard deviation =`sigma=sqrt(1/NSigmaf_i(x_i-barx)^2)`
`=sqrt30.84` =5.55