1 .		Causal-comparative and correlational studies are similar in that [Hint]   both attempt to investigate causal relationships.   both lack manipulation of variables.   both involve two or more variables and one group.   both involve two or more groups and one independent variable.
2 .		The statistic used to determine the relationship between two variables is [Hint]   analysis of covariance.   chi square.   standard deviation.   Pearson r.
3 .		Which of the following terms does NOT belong with the others? [Hint]   Group comparisons   Pearson r   Relationships   Correlation