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.
Two-Sample z-test for Comparing Two Means. Two-Sample z-test for Comparing Two Means. where and are the means of the two samples, Î´ is the hypothesized difference between the population means (0 if testing for equal means), Ï 1 and Ï 2 are the standard deviations of the two populations, and n 1and n 2are the sizes of the two samples.