Help using Base SAS procedures

What to do with a "Ceiling Effect?"

Posts: 46

What to do with a "Ceiling Effect?"

[ Edited ]

Fed lambs hay and different supplements (treatment). However, supplement was fed at a maximum rate, thus residuals not normal.

Any help would be appreciated.


Study design (lamb feeding trial): Effects of using 2 different feed ingredients (juniper and urea) in supplements fed to ewe lambs on the following dependent variables: intake (supplement, hay, and total), etc...).

  • Animal = exp. unit; each lamb has own unique ID
  • All lambs fed hay. Each lamb also fed respective treatment: 1 of 8 different feeds in a 4×2 factorial: 4 juniper levels (15, 30, 45, or 60%) and 2 urea levels (1 or 3%).
  • Focusing right now on supplement intake (SAS name = suppDMIkg)



Super User
Posts: 13,498

Re: What to do with a "Ceiling Effect?"

Posted in reply to AgReseach7

You might consider providing data and code you have used so far. The picture you posted, at least in my browser is too small to read in general and I can only recognize The Univariate Procedure in the title from familiarity.


Instructions at: will show how to turn a SAS data set into data step code that can be posted here or attached as a text file to allow use to test code against your data (or a subset).

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