1 .		It is better to control confounding variables statistically than by the research design. [Hint]  True  False
2 .		In true experimental research, the researcher manipulates the dependent variable to examine its effects on one or more independent variables. [Hint]  True  False
3 .		In a causal-comparative design, no direct manipulation of the independent variable occurs. [Hint]  True  False
4 .		To be considered a variable, a quality or characteristic must have at least three discernible levels. [Hint]  True  False
5 .		A repeated-measures design entails making repeated measurements on a treatment and a control group. [Hint]  True  False
6 .		Two variables can have an interaction effect on the dependent variable even if both do not have individual effects on the dependent variable. [Hint]  True  False
7 .		A causal-comparative design can be used when one wants to establish the causality of an independent variable upon a dependent variable. [Hint]  True  False