"I think it's a mad league, a lot of teams are dropping points and it's really close. Hopefully we can be more consistent in the second half of the season and retain our title."
United's hopes of realising that ambition rest at least partly in the hands of Rooney, whose first-half effort, prodded home from a Darren Fletcher cross, was his 13th Premier League goal of the season.
The victory moves United to within two points of league leaders Chelsea, and Ferguson readily acknowledged the significance of Rooney's pivotal contribution.
"He was a threat to them all day, his penetration behind their back line was very good," said Ferguson.
"He made a mistake in giving the ball away for the goal, that was his one bad moment in the game, but I thought he was exceptionally good today.
Rooney thankful for win at Hull
"He's a natural winner, he's always had that great attitude and determination to do well and he would be even more sick than anyone when he made a mistake.
"But he rectified it and everything's fine."
Ferguson did, however, stress that avoiding mistakes would play a key role in the eventual destination of the title.
"There are some unusual results going round and it's going to be a really tight league," he added.
"Experience will come into it, and I think the team that stays clear of injuries will also have an advantage.
"Other than that, if you make mistakes you're going to get punished. If you eradicate mistakes, whoever does that will have a great chance."
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