Correlation measures the linear relationship between two variables. It gives an indication of the strength of the relationship by measuring and relating the variance of each. Correlation answers the ...

Almost every day you can find in media commentary that XYZ is causing stocks to fall (or rise). Such definitive statements are common—but what’s almost always missing is statistical proof. And if you ...

An Excel pie chart displays categories of data as wedges in a circular graph. This format allows users to quickly see the contribution each category makes to the total figure and a correlation of ...