That means if they polled Arnold at 22% then his support actually could be ANYWHERE from 13% up to 31%. If Cruz polled at 35% then his support actually could be ANYWHERE from 26% to 44%. Since they overlap, the poll is meaningless as they both are within the margin of error of each other. Arnold could be at 31% and Cruz at 26% given the +/- 9% margin of error. Most polls cite a +/- 3% margin of error. That this one is so big means they knew they were skewing the results.