Their 'hypothesis' is that watching excessive amounts of television reduces a person's ability to concentrate.
The results of the experiment did not support/confirm his 'hypothesis'.
put forward a 'hypothesis' = advance a 'hypothesis'
(..) Oh, snap. So, I guess we'll be leaving now. Why should we leave? For all we know he crashed the party and Penny doesn't even want him here. You have a backup hypothesis? Maybe they want to be friends. Or maybe she wants to be friends and he wants something more. Then he and I are on equal ground. (..)2007 TvShow: The Big Bang Theory Title: The Middle Earth Paradigm Season: 1 Episode 6