Multiple choice questions

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Chapter 15: Regression

This activity contains 10 questions.

A line of best fit is also known as a:

	Difference in means
	Discriminant variate
	Regression equation
	Significance value

The r-square statistic is the:

	Proportion of variance accounted for by the independent variables
	Square root of the sample size
	Standardized beta weight
	Statistical significance of the dependent variables, as a set

Standardized beta values:

	Cannot take a negative value
	Lie between -1 and +1
	Range from 0 to 1
	Run from -1 to infinity

Multicollinearity means that:

	Dependent variables are measured on the wrong scale
	Dummy coding should be used for independent variables
	Independent variables are too highly correlated
	The independent variables account for too much variance in the dependent variable

As a general rule of thumb, the sample size required for testing the overall relationship in multiple regression is:

	At least 50 participants and then another 8 per variable
	At least 104 participants plus the number of variables
	At least 250 participants
	Ten participants per variable

As a general rule of thumb, the sample size required for testing the individual pathways in multiple regression is:

	At least 50 participants and then another 8 per variable
	At least 104 participants plus the number of variables
	At least 250 participants
	Ten participants per variable

Which one of these types of multiple regression is used to enter variables in a pre-determined order?

	Backward
	Hierarchical
	Simultaneous
	Stepwise

Which one of these standardized beta weights is the largest?

	-.60
	.01
	.23
	.73

A multiple regression where there is only one independent variable, will produce the same result as a:

	ANOVA
	Correlation coefficient
	p value
	t-test

A multiple regression is used to predict students' exam results from their negative attitudes to statistics (β = -.20), statistical anxiety (β = -.43), cognitive ability (β = .43) and hours spent revising (β = .45). Which is the best predictor of exam results?

	Cognitive ability
	Hours spent revising
	Negative attitudes to statistics
	Statistical anxiety

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