Variation is the differences between individuals of the same species, caused by genetic and environmental factors. Surveys into variation give data that are continuous, which means to come in a range, ...

A characteristic of any species with only a limited number of possible values shows discontinuous variation. Here are some examples: For any species a characteristic that changes gradually over a ...

Quantity A is said to vary directly as another Quantity B when the two quantities A and B depend on each other in such a manner that if Quantity B is changed, then Quantity A changes in the same ratio ...

Incumbency advantage is one of the most widely studied features in American legislative elections. In this article we construct and implement an estimate that allows incumbency advantage to vary ...

Clinical trialists generally accept the premise that surprising results in subgroups of a randomized, controlled trial most likely arise from chance. As we wrote nearly three decades ago, “We believe ...