Question 1

The coefficient of determination indicates

Accepted Answer

A)  the proportion of variance accounted for by the correlation coefficient. 
B)  whether the null hypothesis can be rejected. 
C)  whether the correlation is positive or negative. 
D)  whether the population has been randomly sampled. 
A)  the proportion of variance accounted for by the correlation coefficient. 
B)  whether the null hypothesis can be rejected. 
C)  whether the correlation is positive or negative. 
D)  whether the population has been randomly sampled. A

Question 2

A negative correlation coefficient indicates that

Accepted Answer

A)  there is no relationship between the variables. 
B)  high scores on one variable are associated with low scores on the other variable. 
C)  high scores on one variable are associated with high scores on the other variable. 
D)  it was not calculated accurately. 
A)  there is no relationship between the variables. 
B)  high scores on one variable are associated with low scores on the other variable. 
C)  high scores on one variable are associated with high scores on the other variable. 
D)  it was not calculated accurately. B

Question 3

What statistic is used to assess the degree of association between two nominal variables?

Accepted Answer

A)  The chi-square statistic 
B)  Bivariate regression 
C)  ANOVA 
D)  Pearson's r 
A)  The chi-square statistic 
B)  Bivariate regression 
C)  ANOVA 
D)  Pearson's r A

Question 4

Kramer is conducting a chi-square analysis on a 2 x 2 contingency table. Which statistic should he use to calculate the effect size?

Accepted Answer

A)  Kappa 
B)  Alpha 
C)  Phi 
D)  r 
A)  Kappa 
B)  Alpha 
C)  Phi 
D)  r

Question 5

If the F value indicates that the between-groups variance is not significantly greater than the within-groups variance in an ANOVA, we can conclude that

Accepted Answer

A)  there is random error. 
B)  the group means are from the same population. 
C)  the null hypothesis that the differences between the groups are due only to chance can be rejected. 
D)  there was an error in the calculation. 
A)  there is random error. 
B)  the group means are from the same population. 
C)  the null hypothesis that the differences between the groups are due only to chance can be rejected. 
D)  there was an error in the calculation.

Question 6

A researcher calculates a regression equation in order to

Accepted Answer

A)  predict a score on a second variable from a known score on a first variable. 
B)  determine the strength of the relationship between two nominal variables. 
C)  predict the differences between scores on one variable from the scores on a second variable 
D)  determine the causal relationship between two variables. 
A)  predict a score on a second variable from a known score on a first variable. 
B)  determine the strength of the relationship between two nominal variables. 
C)  predict the differences between scores on one variable from the scores on a second variable 
D)  determine the causal relationship between two variables.

Question 7

The coefficient of determination is to the Pearson correlation coefficient as which of the following is to chi-square?

Accepted Answer

A)  R 
B)  F 
C)  The p-value 
D)  Phi 
A)  R 
B)  F 
C)  The p-value 
D)  Phi

Question 8

Within-group variance in an ANOVA is considered to indicate

Accepted Answer

A)  systematic error. 
B)  differences among the group means. 
C)  that the group means are from the same population. 
D)  random error. 
A)  systematic error. 
B)  differences among the group means. 
C)  that the group means are from the same population. 
D)  random error.

Question 9

A correlation coefficient specifies the __________ and __________ of the linear association between two variables.

Accepted Answer

A)  direction; magnitude 
B)  strength; shape 
C)  direction; distribution 
D)  shape; distribution 
A)  direction; magnitude 
B)  strength; shape 
C)  direction; distribution 
D)  shape; distribution

Question 10

A researcher is interested in whether students' grade point averages differed in between those enrolled in lab science, social science, humanities, and mathematics courses. She compared students from a chemistry, an economics, an art, and a calculus class. What would be the most appropriate statistical analysis for these data?

Accepted Answer

A)  Bivariate regression 
B)  One-way analysis of variance 
C)  Correlation coefficient 
D)  Chi-square test for independence 
A)  Bivariate regression 
B)  One-way analysis of variance 
C)  Correlation coefficient 
D)  Chi-square test for independence

Question 11

The regression line measures

Accepted Answer

A)  the overall effectiveness of the dependent variable. 
B)  the ability to predict a correlation coefficient. 
C)  the average effect size. 
D)  the best possible prediction of the dependent variable 
A)  the overall effectiveness of the dependent variable. 
B)  the ability to predict a correlation coefficient. 
C)  the average effect size. 
D)  the best possible prediction of the dependent variable

Question 12

The proportion of variance measure for the Pearson correlation coefficient is

Accepted Answer

A)  r. 
B)  the effect size. 
C)  the coefficient of determination. 
D)  the contingency table. 
A)  r. 
B)  the effect size. 
C)  the coefficient of determination. 
D)  the contingency table.

Question 13

If r =1.00, then

Accepted Answer

A)  all of the points on the scatterplot will fall on the line of best fit. 
B)  there is a weak positive correlation. 
C)  variable x causes variable y. 
D)  the r will not be statistically significant. 
A)  all of the points on the scatterplot will fall on the line of best fit. 
B)  there is a weak positive correlation. 
C)  variable x causes variable y. 
D)  the r will not be statistically significant.

Question 14

Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

Accepted Answer

A)  .56 
B)  -.81 
C)  -.05 
D)  .34 
A)  .56 
B)  -.81 
C)  -.05 
D)  .34

Question 15

Researcher Jones is interested in assessing the relationship between sex of participant and helping behavior (whether the person helped or did not help). Which of the following statistics should be used?

Accepted Answer

A)  Chi-square statistic 
B)  Kappa 
C)  Bivariate regression 
D)  Pearson's r 
A)  Chi-square statistic 
B)  Kappa 
C)  Bivariate regression 
D)  Pearson's r

Question 16

A researcher wanted to know if aggressive behavior was related to watching violent programs on TV. He selected some students and measured how many violent programs they watched per week (from 0 to 25) and how aggressive their behavior was (as rated on a 1 to 7 scale). What would be the most appropriate statistical analysis for these data?

Accepted Answer

A)  Bivariate regression 
B)  One-way analysis of variance 
C)  Multiple regression 
D)  Chi-square test for independence 
A)  Bivariate regression 
B)  One-way analysis of variance 
C)  Multiple regression 
D)  Chi-square test for independence

Question 17

In a one-way ANOVA the grand mean is defined as

Accepted Answer

A)  the between groups variance. 
B)  the means across all of the participants in the study. 
C)  only the means from the control group. 
D)  n times the degrees of freedom. 
A)  the between groups variance. 
B)  the means across all of the participants in the study. 
C)  only the means from the control group. 
D)  n times the degrees of freedom.

Question 18

__________ is used to compare the means on a dependent variable between two or more groups of participants who differ on a single independent variable.

Accepted Answer

A)  One-way analysis of variance 
B)  Regression 
C)  A contingency table 
D)  Kappa 
A)  One-way analysis of variance 
B)  Regression 
C)  A contingency table 
D)  Kappa

Question 19

To predict a dependent variable from knowledge of an independent variable, which of the following would be most useful?

Accepted Answer

A)  A regression equation 
B)  A post-hoc test 
C)  Means comparisons 
D)  A random sample 
A)  A regression equation 
B)  A post-hoc test 
C)  Means comparisons 
D)  A random sample

Question 20

The effect size for a one-way ANOVA is

Accepted Answer

A)  the F value. 
B)  the degrees of freedom. 
C)  eta. 
D)  the Pearson r. 
A)  the F value. 
B)  the degrees of freedom. 
C)  eta. 
D)  the Pearson r.

The coefficient of determination indicates

A negative correlation coefficient indicates that

What statistic is used to assess the degree of association between two nominal variables?

Kramer is conducting a chi-square analysis on a 2 x 2 contingency table. Which statistic should he use to calculate the effect size?

If the F value indicates that the between-groups variance is not significantly greater than the within-groups variance in an ANOVA, we can conclude that

A researcher calculates a regression equation in order to

The coefficient of determination is to the Pearson correlation coefficient as which of the following is to chi-square?

Within-group variance in an ANOVA is considered to indicate

A correlation coefficient specifies the and of the linear association between two variables.

The regression line measures

The proportion of variance measure for the Pearson correlation coefficient is

If r =1.00, then

Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

Researcher Jones is interested in assessing the relationship between sex of participant and helping behavior (whether the person helped or did not help). Which of the following statistics should be used?

In a one-way ANOVA the grand mean is defined as

__________ is used to compare the means on a dependent variable between two or more groups of participants who differ on a single independent variable.

To predict a dependent variable from knowledge of an independent variable, which of the following would be most useful?

The effect size for a one-way ANOVA is

Introduction to Research

Developing the Research Hypothesis

Ethics in Research

Measures

Reliability and Validity

Surveys and Sampling

Naturalistic Methods

Hypothesis Testing and Inferential Statistics

Correlational Research Designs

Experimental Research: One-Way Designs

Experimental Research: Factorial Designs

Experimental Control and Internal Validity

External Validity

Quasi-Experimental Research Designs

Reporting Research Results

Data Preparation and Univariate Statistics

Multivariate Statistics

Filters

Exam 17: Bivariate Statistics

The coefficient of determination indicates

A negative correlation coefficient indicates that

What statistic is used to assess the degree of association between two nominal variables?

Kramer is conducting a chi-square analysis on a 2 x 2 contingency table. Which statistic should he use to calculate the effect size?

If the F value indicates that the between-groups variance is not significantly greater than the within-groups variance in an ANOVA, we can conclude that

A researcher calculates a regression equation in order to

The coefficient of determination is to the Pearson correlation coefficient as which of the following is to chi-square?

Within-group variance in an ANOVA is considered to indicate

A correlation coefficient specifies the __________ and __________ of the linear association between two variables.

The regression line measures

The proportion of variance measure for the Pearson correlation coefficient is

If r =1.00, then

Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

Researcher Jones is interested in assessing the relationship between sex of participant and helping behavior (whether the person helped or did not help). Which of the following statistics should be used?

In a one-way ANOVA the grand mean is defined as

__________ is used to compare the means on a dependent variable between two or more groups of participants who differ on a single independent variable.

To predict a dependent variable from knowledge of an independent variable, which of the following would be most useful?

The effect size for a one-way ANOVA is

Introduction to Research

Developing the Research Hypothesis

Ethics in Research

Measures

Reliability and Validity

Surveys and Sampling

Naturalistic Methods

Hypothesis Testing and Inferential Statistics

Correlational Research Designs

Experimental Research: One-Way Designs

Experimental Research: Factorial Designs

Experimental Control and Internal Validity

External Validity

Quasi-Experimental Research Designs

Reporting Research Results

Data Preparation and Univariate Statistics

Multivariate Statistics

Filters

A correlation coefficient specifies the and of the linear association between two variables.