Learn what analysis of variance (ANOVA) is, how it works, and when to use it. See how it helps compare means across multiple data groups in statistics and research.

Read on to learn more about what a t-test is, the different formulas used, and when to apply each type to compare means and ...

A straightforward procedure is presented which uses the variance formula of a simple estimator to obtain an approximate formula for the variance of a post-stratified estimator. The approximation is ...

Although analysis of variance (ANOVA) is widely used by ecologists, the full potential of ANOVA as a descriptive tool has not been realized in most ecological studies. As questions addressed by ...

Facilities that focus on manufacturing and production track two kinds of costs: fixed costs and variable costs. The variable costs are those that change when production levels change: raw materials, ...