Learn more about covariance and how financial planners and economists use the concept. Explore an example of covariance in the stock market.

A combination generally refers to an options trading strategy that involves the purchase or sale of multiple calls and puts on the same asset.

In some applications, it is useful to classify the categories into groups that are not necessarily related to frequency. This example, which is a continuation of Example 29.2, shows how you can ...

Lloyd Rosenberg, Nonnormality of Linear Combinations of Normally Distributed Random Variables, The American Mathematical Monthly, Vol. 72, No. 8 (Oct., 1965), pp. 888-890 ...

For example four moments and four linear combinations under general conditions (specified later) determine the distribution of n = 56 independent random variables, but not of 57.