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 t-test For Independent Groups on SPSS. A t-test for independent groups is useful when the researcher's goal is to compare the difference between means of two groups on the same variable. Groups may be formed in two different ways. First, a preexisting characteristic of the participants may be used to divide them into groups.