The analysis by the Taxpayer's Alliance, which lobbies for lower taxes and greater government efficiency, found little apparent correlation between pupil funding and academic achievement.

BBC: Supply teachers 'cost schools ?293m last year'

Bill Vogt and Robert Town conducted a comprehensive survey of the literature in 2006, and found that there is no apparent correlation between mergers and health-care quality.

FORBES: Goal of the NYU-Continuum Hospital Mega-Merger: Raising Prices

The more I analyzed my game, the more apparent it became that there was a negative correlation between how hard I swung and how far I hit the ball.

FORBES: Golf: The Game Of Life

The UN says the correlation between insecurity and opium cultivation has been apparent for several years.

BBC: Afghanistan opium harvest drops by a third - UN

The correlation between nonprofit size and the boss's compensation was not always apparent.

FORBES: Charity Begins With The Boss