The interquartile mean is a measure of central tendency. While all values in a data set are used to calculate the mean, only the interquartile range -- the central portion of a data set -- is used to ...

Here’s a question investors often ask: Where should I invest in active funds and where should I index? For a good many, the answer is simple: They shouldn’t invest in active funds anywhere. Why? They ...

An outlier is an observation that lies an abnormal distance from other values in a random sample from a population,” advises the Engineering Statistics Handbook. One of the standard approaches is to ...