Correlation measures the strength of the linear relationship between two quantitative variables. It is often used in the media to make a sensational story or to inform the public. Correlation is also used extensively by the pharmaceutical industry when studying the effect of one variable on another. In healthcare, correlation is used to drive the decision-making process. Should this be the primary method you use in making decisions based on data? Provide an example of where you might expect to see correlation used in your work.