Here, we can use step deviation method to find the mean of given data.
First we have to construct a table for the given data. Please refer to video for creating complete table.
We know, Mean,`(barX) = a+(sumf_iu_i)/(sumf_i)**h`
Here, `a =` assumed mean `= 200`
`sumf_iu_i = -53`
`sumf_i = 45`
`h =` = step size `=40`
Putting these values in formula,
`barX = 200+(-53)**40/45 = 200-424/9 = 152.89 `
So, Mean is `152.89` that indiates average wickets taken by a bowler.
