21A. For a between-subjects study evaluating the mean difference between two treatment conditions, the appropriate hypothesis test is

1.single-factor analysis of variance.

2.independent-measuresttest.

3.chi-square test for independence.

4.repeated-measuresttest.

B. Statistical methods that use sample data to answer general questions about a population are called ____.

1.parameters

2.statistics

3.descriptive statistics

4.inferential statistics

C. What additional information is provided by measurements on an ordinal scale that is not provided by measurements from a nominal scale?

1.whether two individuals are the same or different

2.whether one score is more than two times larger than another

3.of two different measurements, which is the larger score

4.how much difference there is between two individuals

D. The purpose of a hypothesis test is

1.to determine the direction of the relationship between two variables.

2.all of the other options are goals of a hypothesis test.

3.to rule out chance as a plausible explanation for the results obtained in a research study.

4.to measures the strength of the relationship between two variables.