Posts Tagged ‘percentages’

Calculate and Compare Proportions — with Validity and Confidence

Saturday, February 16th, 2008

Proportions pop up everywhere in life — “Four out of five dentists recommend…”, “Obama leads Clinton by ten percentage points among likely voters in Wisconsin…”, “Last month’s manufacturing yields are up from a year ago…”, and so on. Anytime you calculate the fraction, portion, or percentage something takes up from the whole, that’s a proportion. And Six Sigma provides a method for you to discover if one proportion is truly different from another. (more…)