Contrast Code Numbers

[LABRADOR]

Hi, I was hoping someone could help explain to me what I am being asked. And how it works. The notes weren't very clear.

[pink_poodle · Accepted solution]

This question is about pairwise comparison of the means. The answer is probably 1 0 -1. There is a similar example here contrasting row 1 and row 3: https://support.sas.com/kb/24/984.html.