Question 1

Suppose that we are given the regression equation, Y ´ = 12 + .80 X . If we observe an X score of 2, what score on Y would we expect?

Accepted Answer

A) 8 
B) 10.4 
C) 13.6 
D) 16.4 
A) 8 
B) 10.4 
C) 13.6 
D) 16.4

Question 2

Which of the following is used to show the relationship between two dichotomous variables, at least one of which is a true dichotomy?

Accepted Answer

A) Tetrachoric correlation 
B) Phi coefficient 
C) Point biserial correlation 
D) Spearman's rho 
A) Tetrachoric correlation 
B) Phi coefficient 
C) Point biserial correlation 
D) Spearman's rho

Question 3

Which of the following is true of correlations?

Accepted Answer

A) They cannot be used to determine statistical significance. 
B) They provide the basis for transforming observations to scales. 
C) They are particularly useful with nominal scales. 
D) They describe the direction and magnitude of relationships between two variables. 
A) They cannot be used to determine statistical significance. 
B) They provide the basis for transforming observations to scales. 
C) They are particularly useful with nominal scales. 
D) They describe the direction and magnitude of relationships between two variables.

Question 4

The intercept is the

Accepted Answer

A) value obtained using the equation to predict scores. 
B) slope of the regression line. 
C) value of Y when X is zero. 
D) standard deviation of the set of scores. 
A) value obtained using the equation to predict scores. 
B) slope of the regression line. 
C) value of Y when X is zero. 
D) standard deviation of the set of scores.

Question 5

In correlation analysis, we ask whether two variables

Accepted Answer

A) can be measured. 
B) experience regression. 
C) have a causal relationship. 
D) covary. 
A) can be measured. 
B) experience regression. 
C) have a causal relationship. 
D) covary.

Question 6

To assess the relationship between intelligence and passing or failing this exam, you should compute the

Accepted Answer

A) point biserial correlation. 
B) Pearson r . 
C) biserial correlation. 
D) tetrachoric correlation. 
A) point biserial correlation. 
B) Pearson r . 
C) biserial correlation. 
D) tetrachoric correlation.

Question 7

People who drink more caffeinated beverages tend to experience more alertness and psychomotor activity. This demonstrates a(n)

Accepted Answer

A) positive correlation. 
B) negative correlation. 
C) zero correlation. 
D) unknown. 
A) positive correlation. 
B) negative correlation. 
C) zero correlation. 
D) unknown.

Question 8

A correlation of .6 was obtained from a particular sample. The two measures are then administered to a sample from a more homogeneous population. The expected correlation in this new sample will probably be

Accepted Answer

A) 0 
B) less than .6. 
C) approximately .6. 
D) greater than .6. 
A) 0 
B) less than .6. 
C) approximately .6. 
D) greater than .6.

Question 9

Regression plots are pictures showing

Accepted Answer

A) the relationship between variables. 
B) cause and effect. 
C) the null hypothesis. 
D) residuals. 
A) the relationship between variables. 
B) cause and effect. 
C) the null hypothesis. 
D) residuals.

Question 10

What is the point of least squares for the set of scores [2, 7, 8, 11]?

Accepted Answer

A) Indeterminate 
B) 4 
C) 7 
D) 10 
A) Indeterminate 
B) 4 
C) 7 
D) 10

Question 11

Which of the following is true of the best-fitting line?

Accepted Answer

A) It establishes statistical significance. 
B) It increases as the correlation decreases. 
C) It is rarely useful for prediction. 
D) It minimizes residuals. 
A) It establishes statistical significance. 
B) It increases as the correlation decreases. 
C) It is rarely useful for prediction. 
D) It minimizes residuals.

Question 12

A common use of correlation is to provide evidence for

Accepted Answer

A) criterion validity. 
B) face validity. 
C) a normative sample. 
D) a scatter plot. 
A) criterion validity. 
B) face validity. 
C) a normative sample. 
D) a scatter plot.

Question 13

If the scores on X give us no information about the scores on Y , the sets of scores likely have

Accepted Answer

A) a positive correlation. 
B) a negative correlation. 
C) no correlation. 
D) curvilinear correlation. 
A) a positive correlation. 
B) a negative correlation. 
C) no correlation. 
D) curvilinear correlation.

Question 14

Suppose that you have two variables, one with a mean of 15 and another with a mean of 19. If you know only that one person's score on the first variable is 14, the best prediction of that person's score on the other is

Accepted Answer

A) 0. 
B) 15. 
C) 19. 
D) indeterminate. 
A) 0. 
B) 15. 
C) 19. 
D) indeterminate.

Question 15

Diagrams that use a single point to show a person's scores on two measures are called ____ plots.

Accepted Answer

A) validity 
B) regression 
C) scatter 
D) normality 
A) validity 
B) regression 
C) scatter 
D) normality

Question 16

Explain how a third variable can influence an observed relationship between two variables.

Accepted Answer

A third variable can influence an observ

Question 17

In a bivariate distribution, the relationship between X and Y

Accepted Answer

A) is best described by a straight line. 
B) can sometimes be nonlinear. 
C) is always systematic. 
D) cannot be plotted in a scatter diagram. 
A) is best described by a straight line. 
B) can sometimes be nonlinear. 
C) is always systematic. 
D) cannot be plotted in a scatter diagram.

Question 18

In order to determine the relationship between a true dichotomous variable and a continuous variable, one would compute

Accepted Answer

A) the phi coefficient. 
B) the point biserial correlation. 
C) Spearman's rho. 
D) the Pearson r . 
A) the phi coefficient. 
B) the point biserial correlation. 
C) Spearman's rho. 
D) the Pearson r .

Question 19

Compare and contrast shrinkage and restriction of range.

Accepted Answer

Shrinkage and restriction of range are b

Question 20

Correlation measures the magnitude and ____ of a relationship.

Accepted Answer

A) strength 
B) consistency 
C) direction 
D) regression 
A) strength 
B) consistency 
C) direction 
D) regression

Exam 3: Correlation and Regression

Suppose that we are given the regression equation, Y ´ = 12 + .80 X . If we observe an X score of 2, what score on Y would we expect?

Which of the following is used to show the relationship between two dichotomous variables, at least one of which is a true dichotomy?

Which of the following is true of correlations?

The intercept is the

In correlation analysis, we ask whether two variables

To assess the relationship between intelligence and passing or failing this exam, you should compute the

People who drink more caffeinated beverages tend to experience more alertness and psychomotor activity. This demonstrates a(n)

A correlation of .6 was obtained from a particular sample. The two measures are then administered to a sample from a more homogeneous population. The expected correlation in this new sample will probably be

Regression plots are pictures showing

What is the point of least squares for the set of scores [2, 7, 8, 11]?

Which of the following is true of the best-fitting line?

A common use of correlation is to provide evidence for

If the scores on X give us no information about the scores on Y , the sets of scores likely have

Suppose that you have two variables, one with a mean of 15 and another with a mean of 19. If you know only that one person's score on the first variable is 14, the best prediction of that person's score on the other is

Diagrams that use a single point to show a person's scores on two measures are called ____ plots.

Explain how a third variable can influence an observed relationship between two variables.

In a bivariate distribution, the relationship between X and Y

In order to determine the relationship between a true dichotomous variable and a continuous variable, one would compute

Compare and contrast shrinkage and restriction of range.

Correlation measures the magnitude and ____ of a relationship.

Introduction

Norms and Basic Statistics for Testing

Reliability

Validity

Writing and Evaluating Test Items

Test Administration

Interviewing Techniques

Theories of Intelligence and the Binet Scales

The Wechsler Intelligence Scales: Wais-Iv, Wisc-Iv, and Wppsi-III

Testing in Education: Tests of Ability in Education and Special Education

Standardized Tests in Education, Civil Service, and the Military

Applications in Clinical and Counseling Settings

Projective Personality Tests

Computers and Basic Psychological Science in Testing

Testing in Counseling Psychology

Testing in Health Psychology and Health Care

Testing in Industrial and Business Settings

Test Bias

Testing and the Law

The Future of Psychological Testing

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