Dear all,

I would like to confirm the following issue:

1. How did the IWRES be calculated from the output data? Is the IWRES=(DV-predicted)/weight ?

2. *what is detail **calculation **information of LOESS regression **including *(1) degree of local polynomials, (2) smoothing parameter, and (3) weight function *in the IWRES vs IPRED (or ***I****WRES vs IVAR*** )*? * *

*Thanks in Advance*

*Emily*