In the first case, there is a strong upward-sloping relationship between X and Y; in the second case, no apparent relationship; in the third case, a strong downward-sloping relationship. Note the ...

Now let’s examine the correlation between Chevron’s (CVX) stock, crude oil, and natural gas prices. The correlation coefficient shows the relationship between two variables. A correlation coefficient ...

This example defines modules to compute correlation coefficients between numeric variables and standardized values for a set of data. /* Module to compute correlations */ start corr; n=nrow(x); /* ...

The mere mention of math can bring back haunting memories of unfinished exams and complex equations. But what if I told you that the math we’re about to explore confirms a lot of what you already ...

It shows the evolution of the realized correlation coefficients RCorr_τ between sectors and markets. The long-term ...