1 .		The control procedure that allows the researcher to determine the effect of the independent variable and the control variable on the dependent variable both separately and in combination is [Hint]   analysis of covariance.   matching.   forming subgroups to represent all levels of the control variable.   randomization.
2 .		Which of the following control procedures is LEAST likely to limit the number of subjects that can be included? [Hint]   Matching   Comparing homogeneous groups   Pair-wise matching   Factorial analysis of variance
3 .		A measure that indicates the average performance of a group on some variable is the [Hint]   mean.   analysis of covariance.   chi square.   standard deviation.
4 .		The inferential statistic used to determine whether there are differences in the frequency of an occurrence between two or more groups is [Hint]   analysis of covariance.   mean.   chi square.   standard deviation.
5 .		Which of the following is NOT a control procedure used in causal-comparative research? [Hint]   Matching   Subgroups   Chi square   Analysis of covariance
6 .		The statistical procedure used to study the interaction of two independent variables on the dependent variable is known as [Hint]   Chi square.   t test.   factorial analysis of variance.   analysis of covariance.