The correlation function is a useful signal-analysis tool that engineers often overlook. Its formidable equation, which you have probably not thought about since your undergraduate signals and systems ...

Tyler Vigen’s book, Spurious Correlations, is warm, funny and makes several very important points. According to Vigen, his book is based on dozens of correlations between completely unrelated sets of ...

Four of your team members are hard at work, side by side at your facility. Each is wearing a brand-new gas detector that was calibrated and bump tested only a few hours ago. The problem is that two of ...

Some investors and analysts use around 90 or 100 days’ worth of historical prices for sufficient quantitative analysis. A shorter period, though, could be used to compare long-term correlation. Below ...

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 ...

Causation and correlation may sound alike but are very different. The former means the root of subsequent events, while the latter refers to an actual or apparent relationship between trends in which ...