multiple choice questions for Objective 5

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Chapter 8

This activity contains 7 questions.

Why is the control of extraneous variables so important in causal-comparative studies?

	The lack of randomization creates a concern about the equivalence of groups.
	The lack of the researcher's direct manipulation of the independent variable creates concerns about the treatment fidelity.
	The impact of extraneous variables could be problematic.
	All of these

Which of the following is NOT a control procedure used in causal-comparative research?

	Matching
	Subgroups
	Chi square
	Analysis of covariance

Which of the following control procedures is LEAST likely to limit the number of subjects that can be included?

	Matching
	Comparing homogenous groups
	Pair-wise matching
	Factorial analysis of variance

A research investigated college GPA for residential and nonresidential students in three levels of family income. The likely control variable is

	College GPA
	Residential or nonresidential status
	College completion rate
	Family income

The statistical procedure used to study the interaction of two independent variables on the dependent variable is known as

	Chi square.
	t test.
	factorial analysis of variance.
	analysis of covariance.

An analysis of covariance "controls" extraneous variables through the

	statistical adjustment of the dependent variable scores for differences on the extraneous variables.
	systematic elimination of bias.
	restriction of sample size.
	use of homogenous groups.

Which of the following is NOT an inferential statistic?

	t test
	Standard deviation
	Analysis of variance
	Chi square

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