Exam 9: The Basics of Experimentation and Testing for a Difference Between Means

If knowing the level of an independent variable received by a participant allows perfect prediction of that participant 's score in an experiment, then will be. $\eta ^ { 2 }$

Random assignment of participants requires that.

The use of tind rests on the assumption that the.

If the results of an experiment using tind were summarized as t(20) = 2.146, p < .05, then you would know that the probability of the difference between the means occurring by chance is and that the difference is.

The tind is appropriate for analyzing data from a one-factor design using levels of an independent variable.

Extraneous variables in an experiment can affect the.

The standard error of a theoretical sampling distribution of differences between means is .

If tobs does not fall into a rejection region, then the decision is to.

The formula for tind is.

Variables other than the independent variable that can affect the dependent variable are called variables.

A "robust" test implies that violations of the assumptions have little effect on the.

A journal report of the results of a tind on two groups in an experiment should include which of the following?

Eta squared provides a measure of.

The dilemma facing the experimenter is determining how large a difference between the sample means is enough to decide that something other than is at work in the experiment.

The distribution of the difference between two sample means when all possible pairs of samples of size n are selected from a population is called a.

Rejecting H0 with a tind and a two-tailed test.

In a nondirectional tind test, a rejection region is located in of the sampling distribution of t.

In a directional tind test, a rejection region is located in of the sampling distribution of t.

If the result of a tind on an experiment is reported as t(28) = 2.633, p < .05, then you know that the.

When rejection regions are located at both ends of the sampling distribution for t, a test is used.