The term is best known as a mechanical effect, and is used as an analogy to a falling row of dominoes. It typically refers to a linked sequence of events where the time between successive events is relatively small.
9 terms. What is the difference between a z test and a t-test. Z: tests probability sample was drawn from a population with a known mean and known standard deviation. T; tests probability sample was drawn from a population with known mean but unknown standard deviation. z-test.
The independent-samples t test is what we refer to as a robust test. That is, the t test is. relatively insensitive (having little effect) to violations of normality and homogeneity of. variance, depending on the sample size and the type and magnitude of the violation.