Hello All,

I m little confused what is the right formula for Root Mean Square Percentage Error (RMSPE)

Actual Pred

[1,] 61 60.010

[2,] 62 58.001

[3,] 63 65.200

[4,] 64 59.800

[5,] 65 63.200

According to me it should be as follows :

Step 1 : Difference (Actual-Pred)

Step 2 : Difference / Actual

Step 3 : Multiply by 100

Step 4 : Take Square

Step 5 : Take Square root

Step 6 : Then take Mean

So ,according to me RMSPE should be 4.17

Can anyone verify this approach ?

On web,I m getting different formulas for RMSPE,so little confused regarding it.

Any help from any Statistician in this AV forum would be highly appreciated.

Thanks,

Rohit