The empirical rule describes how points are clustered in a normally-distributed data set. It states that 95% of data fall ...

Discover how the Cboe SKEW Index assesses market volatility and perceived tail-risk in the S&P 500, despite its limitations as a predictive tool.

When business researchers analyze data, they often rely on assumptions to help make sense of what they find. But like anyone else, they can run into a whole lot of trouble if those assumptions turn ...