*Glossary*

**Binomial coefficient:** the number of ways to select *k* objects from *n* objects (*k ≤ n*) without regard to the order of selection; written as =

**Concave region:** a region that is not convex.

**Confidence interval:** the interval of values within which a parameter of a random variable **X** is declared to be with a specified probability; e.g., if the mean of **X** is estimated to be in the interval (*a, b*) with probability 0.95, then (*a, b*) is said to be a ...