From the course: Six Sigma: Black Belt

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Correlation in Six Sigma projects

Correlation in Six Sigma projects - Minitab Tutorial

From the course: Six Sigma: Black Belt

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Correlation in Six Sigma projects

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- Have you ever wondered if the amount of coffee consumed on the morning of a test affects the outcome of your test score? Or is there a relationship between the price of apples and the price of gas? What I'm really asking is, is there a correlation? In Six Sigma projects, we're interested in seeing and analyzing how potential Xs impact Y. Is there a relationship between X and Y? And if there is, is it a statistically significant relationship? That's when a correlation hypothesis test is needed. In Green Belt training, you learned that when there is a relationship between two variables, we say there is correlation. The strength of the relationship is quantified by the correlation coefficient, or Pearson Correlation Coefficient. It can range from minus one to plus one, and if there is no correlation, the coefficient is zero or close to zero. The correlation and the coefficient are positive if one variable increases…

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