An r = −0.45 indicates:

All true experimental research studies contain two or more __________ that the researcher manipulates.

When framing the season as an experiment, which of the following would be the most ideal research design?

Within-subjects designs typically:

__________ research is research that deals with numerical data.

A key limitation of correlation is inability to infer:

An advantage of between-subjects designs is:

An r = 0.72 indicates:

Research that typically does not deal with numerical data is __________ research.

The advantage of a within-subjects design is that: