Question 1

Which Test Do I Use? An experimenter considers all of these factors when selecting a statistical test except

Accepted Answer

A) the number of degrees of freedom. 
B) the number of independent variables. 
C) the number of levels. 
D) whether the experiment is within or between subjects. 
A) the number of degrees of freedom. 
B) the number of independent variables. 
C) the number of levels. 
D) whether the experiment is within or between subjects.

Question 2

The Chi Square Test Cramer's coefficient Phi estimates the

Accepted Answer

A) degree of association between two categorical variables. 
B) power of a chi square test. 
C) probability of observed frequencies in a chi square test. 
D) size of the treatment effect produced by two categorical variables. 
A) degree of association between two categorical variables. 
B) power of a chi square test. 
C) probability of observed frequencies in a chi square test. 
D) size of the treatment effect produced by two categorical variables.

Question 3

A One-Way Analysis of Variance If Zack has 75 subjects and 72 degrees of freedom within groups in a one-way analysis of variance, his independent variable must have ___ levels.

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 6 
A) 3 
B) 4 
C) 5 
D) 6

Question 4

The Chi Square Test Candace studies factors related to students dropping out of school.She constructs a 2 X 2 contingency table (Drinking alcohol: under 5 drinks a week, over 5 drinks a week X Study time: under 15 hours a week, over 15 hours a week).How many degrees of freedom are required by a chi square test of these data?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 5

Which Test Do I Use? Which scale allows us to conclude that the group trained to breathe diaphragmatically experienced half the panic attacks as the control group?

Accepted Answer

A) interval 
B) nominal 
C) ordinal 
D) ratio 
A) interval 
B) nominal 
C) ordinal 
D) ratio

Question 6

Sources of Variability An F ratio compares ____ to

Accepted Answer

A) between-groups variability; within-groups variability. 
B) the difference among treatment means; variability due to error. 
C) the effect of the independent variable; the effect of extraneous variables. 
D) variability due to treatment; variability due to error. 
A) between-groups variability; within-groups variability. 
B) the difference among treatment means; variability due to error. 
C) the effect of the independent variable; the effect of extraneous variables. 
D) variability due to treatment; variability due to error.

Question 7

The Chi Square Test A chi square test compares

Accepted Answer

A) observed and expected frequencies. 
B) treatment group variability with expected population variability. 
C) treatment mean differences and sample variability. 
D) treatment means. 
A) observed and expected frequencies. 
B) treatment group variability with expected population variability. 
C) treatment mean differences and sample variability. 
D) treatment means.

Question 8

The Chi Square Test In the priming experiment described in the text, Cramer's coefficient Phi ($\phi $) was .81.This suggests a ____ degree of association between the priming manipulation and responses to the test question.

Accepted Answer

A) negligible 
B) low 
C) medium 
D) large 
A) negligible 
B) low 
C) medium 
D) large

Question 9

Which Test Do I Use? Students interviewed three candidates for Dean of Student Affairs and then ranked them from first to third place.Which level of measurement did they use?

Accepted Answer

A) interval 
B) nominal 
C) ordinal 
D) ratio 
A) interval 
B) nominal 
C) ordinal 
D) ratio

Question 10

A One-Way Analysis of Variance How do you calculate the degrees of freedom for within-groups variance in a one-way analysis of variance?

Accepted Answer

A) the number of groups minus the number of subjects per group 
B) the number of subjects minus one 
C) the number of subjects minus the number of treatments 
D) the number of treatments minus one 
A) the number of groups minus the number of subjects per group 
B) the number of subjects minus one 
C) the number of subjects minus the number of treatments 
D) the number of treatments minus one

Question 11

Analyzing Data from a Between-Subjects Factorial Experiment How many degrees of freedom within groups are there in a 2 X 2 factorial experiment with 10 subjects per condition?

Accepted Answer

A) 3 
B) 9 
C) 27 
D) 36 
A) 3 
B) 9 
C) 27 
D) 36

Question 12

Analyzing Data from a Between-Subjects Factorial Experiment A two-way analysis of variance is appropriate for experiments that have

Accepted Answer

A) only two treatments. 
B) only two independent variables with two or more levels per variable. 
C) several independent variables with only two levels per variable. 
D) two or more dependent variables. 
A) only two treatments. 
B) only two independent variables with two or more levels per variable. 
C) several independent variables with only two levels per variable. 
D) two or more dependent variables.

Question 13

Two-Way Analysis of Variance There are three levels of factor A and two levels of factor B in a two-way ANOVA.How many degrees of freedom will there be in the numerator of an F test for factor A?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 14

Statistics for Two Group Experiments The ____ should be used to evaluate ordinal data from two independent groups.

Accepted Answer

A) chi square test 
B) Mann-Whitney U test 
C) t test for independent groups 
D) Wilcoxon test 
A) chi square test 
B) Mann-Whitney U test 
C) t test for independent groups 
D) Wilcoxon test

Question 15

Interpreting the Results When should you perform a post hoc test?

Accepted Answer

A) after a nonsignificant analysis of variance 
B) after a significant analysis of variance 
C) instead of an analysis of variance 
D) after a significant analysis of variance or instead of an analysis of variance 
A) after a nonsignificant analysis of variance 
B) after a significant analysis of variance 
C) instead of an analysis of variance 
D) after a significant analysis of variance or instead of an analysis of variance

Question 16

Sources of Variability When a computed F ratio is statistically significant,

Accepted Answer

A) all treatment means were probably drawn from the same population. 
B) the amount of between-groups variability is large compared to within- groups variability. 
C) the F ratio is 1 or less. 
D) the computed F is less than F critical. 
A) all treatment means were probably drawn from the same population. 
B) the amount of between-groups variability is large compared to within- groups variability. 
C) the F ratio is 1 or less. 
D) the computed F is less than F critical.

Question 17

The t Test Sample size affects

Accepted Answer

A) alpha level. 
B) test statistic size. 
C) variability. 
D) test statistic size and variability. 
A) alpha level. 
B) test statistic size. 
C) variability. 
D) test statistic size and variability.

Question 18

The t Test A t test for matched groups trades ____ for

Accepted Answer

A) fewer degrees of freedom; reduced variability due to extraneous variables. 
B) more degrees of freedom; reduced rate of Type 1 error. 
C) increased variability due to extraneous variables; higher rate of Type 2 error. 
D) a smaller t observed; a smaller t critical. 
A) fewer degrees of freedom; reduced variability due to extraneous variables. 
B) more degrees of freedom; reduced rate of Type 1 error. 
C) increased variability due to extraneous variables; higher rate of Type 2 error. 
D) a smaller t observed; a smaller t critical.

Question 19

Statistics for Two Group Experiments Blake matched subjects on GPA before randomly assigning them to one of two Graduate Record Exam (GRE) preparation conditions (self-study or workshop).Which statistical test should he use to analyze his dependent variable which is a score from 0-100 on a GRE practice test?

Accepted Answer

A) t test for independent groups 
B) t test for matched groups 
C) two-way ANOVA 
D) Wilcoxon test 
A) t test for independent groups 
B) t test for matched groups 
C) two-way ANOVA 
D) Wilcoxon test

Question 20

The t Test When a pollster reports that the margin of error is $\pm$ 3, this refers to the survey's

Accepted Answer

A) confidence interval. 
B) degrees of freedom. 
C) estimated effect size. 
D) robustness. 
A) confidence interval. 
B) degrees of freedom. 
C) estimated effect size. 
D) robustness.

Which Test Do I Use? An experimenter considers all of these factors when selecting a statistical test except

The Chi Square Test Cramer's coefficient Phi estimates the

A One-Way Analysis of Variance If Zack has 75 subjects and 72 degrees of freedom within groups in a one-way analysis of variance, his independent variable must have ___ levels.

Which Test Do I Use? Which scale allows us to conclude that the group trained to breathe diaphragmatically experienced half the panic attacks as the control group?

Sources of Variability An F ratio compares ____ to

The Chi Square Test A chi square test compares

The Chi Square Test In the priming experiment described in the text, Cramer's coefficient Phi ( $\phi$ ) was .81.This suggests a ____ degree of association between the priming manipulation and responses to the test question.

Which Test Do I Use? Students interviewed three candidates for Dean of Student Affairs and then ranked them from first to third place.Which level of measurement did they use?

A One-Way Analysis of Variance How do you calculate the degrees of freedom for within-groups variance in a one-way analysis of variance?

Analyzing Data from a Between-Subjects Factorial Experiment How many degrees of freedom within groups are there in a 2 X 2 factorial experiment with 10 subjects per condition?

Analyzing Data from a Between-Subjects Factorial Experiment A two-way analysis of variance is appropriate for experiments that have

Two-Way Analysis of Variance There are three levels of factor A and two levels of factor B in a two-way ANOVA.How many degrees of freedom will there be in the numerator of an F test for factor A?

Statistics for Two Group Experiments The ____ should be used to evaluate ordinal data from two independent groups.

Interpreting the Results When should you perform a post hoc test?

Sources of Variability When a computed F ratio is statistically significant,

The t Test Sample size affects

The t Test A t test for matched groups trades ____ for

The t Test When a pollster reports that the margin of error is $\pm$ 3, this refers to the survey's

Experimental Psychology and the Scientific Method

Research Ethics

Alternatives to Experimentation: Nonexperimental Designs

Alternatives to Experimentation: Surveys and Interviews

Alternatives to Experimentation: Correlational and Quasi-Experimental Designs

Formulating the Hypothesis

The Basics of Experimentation

Solving Problems: Controlling Extraneous Variables

Basic Between-Subjects Designs

Between-Subjects Factorial Designs

Within-Subjects Designs

Within-Subjects Designs: Small N

Why We Need Statistics

Drawing Conclusions: the Search for the Elusive Bottom Line

Writing the Research Report

Filters

Exam 14: Analyzing Results

Which Test Do I Use? An experimenter considers all of these factors when selecting a statistical test except

The Chi Square Test Cramer's coefficient Phi estimates the

A One-Way Analysis of Variance If Zack has 75 subjects and 72 degrees of freedom within groups in a one-way analysis of variance, his independent variable must have ___ levels.

Which Test Do I Use? Which scale allows us to conclude that the group trained to breathe diaphragmatically experienced half the panic attacks as the control group?

Sources of Variability An F ratio compares ____ to

The Chi Square Test A chi square test compares

The Chi Square Test In the priming experiment described in the text, Cramer's coefficient Phi ( ϕ\phi ϕ ) was .81.This suggests a ____ degree of association between the priming manipulation and responses to the test question.

Which Test Do I Use? Students interviewed three candidates for Dean of Student Affairs and then ranked them from first to third place.Which level of measurement did they use?

A One-Way Analysis of Variance How do you calculate the degrees of freedom for within-groups variance in a one-way analysis of variance?

Analyzing Data from a Between-Subjects Factorial Experiment How many degrees of freedom within groups are there in a 2 X 2 factorial experiment with 10 subjects per condition?

Analyzing Data from a Between-Subjects Factorial Experiment A two-way analysis of variance is appropriate for experiments that have

Two-Way Analysis of Variance There are three levels of factor A and two levels of factor B in a two-way ANOVA.How many degrees of freedom will there be in the numerator of an F test for factor A?

Statistics for Two Group Experiments The ____ should be used to evaluate ordinal data from two independent groups.

Interpreting the Results When should you perform a post hoc test?

Sources of Variability When a computed F ratio is statistically significant,

The t Test Sample size affects

The t Test A t test for matched groups trades ____ for

The t Test When a pollster reports that the margin of error is ±\pm± 3, this refers to the survey's

Experimental Psychology and the Scientific Method

Research Ethics

Alternatives to Experimentation: Nonexperimental Designs

Alternatives to Experimentation: Surveys and Interviews

Alternatives to Experimentation: Correlational and Quasi-Experimental Designs

Formulating the Hypothesis

The Basics of Experimentation

Solving Problems: Controlling Extraneous Variables

Basic Between-Subjects Designs

Between-Subjects Factorial Designs

Within-Subjects Designs

Within-Subjects Designs: Small N

Why We Need Statistics

Drawing Conclusions: the Search for the Elusive Bottom Line

Writing the Research Report

Filters

The Chi Square Test In the priming experiment described in the text, Cramer's coefficient Phi ( $\phi$ ) was .81.This suggests a ____ degree of association between the priming manipulation and responses to the test question.

The t Test When a pollster reports that the margin of error is $\pm$ 3, this refers to the survey's