Question 1

In a two-way ANOVA, if there is a significant interaction:

Accepted Answer

A)  at least one of the main effects is significant. 
B)  the interpretation of significant main effects is independent of the interaction. 
C)  the interpretation of any significant main effects should be ignored. 
D)  both of the main effects are also significant. 
A)  at least one of the main effects is significant. 
B)  the interpretation of significant main effects is independent of the interaction. 
C)  the interpretation of any significant main effects should be ignored. 
D)  both of the main effects are also significant.

Question 2

The owners of the Syfy channel are interested in whether watching the Syfy channel causes people to become "geeky," and if so, whether any such effects depend on a person's gender.They hire a researcher to design and carry out the appropriate study.The researcher randomly assigns an equal number of men and women to watch 0, 3, 5, or 9 hours of the Syfy channel each week for 6 weeks.What is the research hypothesis for the main effect of gender?

Accepted Answer

A)  On average, men and women are equally geeky. 
B)  On average, men and women differ in their geekiness levels. 
C)  On average, men are geekier when they watch more hours of the Syfy channel than fewer hours. 
D)  On average, men are geekier than women when watching fewer hours but less geeky than women when watching more hours of the Syfy channel. 
A)  On average, men and women are equally geeky. 
B)  On average, men and women differ in their geekiness levels. 
C)  On average, men are geekier when they watch more hours of the Syfy channel than fewer hours. 
D)  On average, men are geekier than women when watching fewer hours but less geeky than women when watching more hours of the Syfy channel.

Question 3

Overall, rats that received a drug took longer to find their way out of a maze than rats that received a placebo, F (1, 57) = 7.23, p  0.10.Which effect(s) must be present for these results to be true?

Accepted Answer

A)  main effect of drug 
B)  main effect of rat species 
C)  interaction of drug and rat species 
D)  main effect of drug and an interaction of drug and rat species 
A)  main effect of drug 
B)  main effect of rat species 
C)  interaction of drug and rat species 
D)  main effect of drug and an interaction of drug and rat species

Question 4

When performing a two-way between-groups ANOVA, effect size is measured using _____, and it is calculated for _____ effects.

Accepted Answer

A)  Cohen's d; two 
B)  R2; two 
C)  Cohen's d; three 
D)  R2; three 
A)  Cohen's d; two 
B)  R2; two 
C)  Cohen's d; three 
D)  R2; three

Question 5

It is helpful to represent the main effects and interactions of a factorial ANOVA graphically in a bar graph because when lines are drawn to connect the bars, they will be _____ if there is a main effect and _____ if there is an interaction.

Accepted Answer

A)  separate but parallel; flat 
B)  separate but parallel; intersecting 
C)  intersecting; flat 
D)  flat and parallel; intersecting 
A)  separate but parallel; flat 
B)  separate but parallel; intersecting 
C)  intersecting; flat 
D)  flat and parallel; intersecting

Question 6

Roediger and Karpicke (2006) investigated whether the test-enhanced learning effect (the demonstration that repeated testing improves memory for material) was due merely to repeated exposure to material.They randomly assigned participants to one of two study conditions (study-study or study-test) and to one of three retention interval conditions (final test at a delay of 5 minutes, 2 days, or 1 week).The dependent variable was the proportion of idea units recalled from an encyclopedia passage.What is(are) the main effect(s) being tested in the study?

Accepted Answer

A)  study condition 
B)  retention interval condition and idea units recalled 
C)  study condition and idea units recalled 
D)  study condition and retention interval condition 
A)  study condition 
B)  retention interval condition and idea units recalled 
C)  study condition and idea units recalled 
D)  study condition and retention interval condition

Question 7

A researcher is examining the relation between patrol location (more affluent vs.less affluent neighborhoods) and amount of training (5 weeks, 10 weeks, or 15 weeks) to police job performance in a small town.The researcher finds a significant interaction in that the strength of the effect of training varies depending on patrol location; however, the direction of the effect does not change.This type of effect is a:

Accepted Answer

A)  quantitative interaction. 
B)  qualitative interaction. 
C)  main effect. 
D)  marginal means. 
A)  quantitative interaction. 
B)  qualitative interaction. 
C)  main effect. 
D)  marginal means.

Question 8

In a table depicting the cells of a two-way ANOVA, the marginal means reflect:

Accepted Answer

A)  the interaction. 
B)  the two main effects. 
C)  one of the main effects. 
D)  within-groups variance. 
A)  the interaction. 
B)  the two main effects. 
C)  one of the main effects. 
D)  within-groups variance.

Question 9

The owners of the Syfy channel are interested in whether watching the Syfy channel causes people to become "geeky," and if so, whether any such effects depend on a person's gender.They hire a researcher to design and carry out the appropriate study.The researcher randomly assigns an equal number of men and women to watch 0, 3, 5, or 9 hours of the Syfy channel each week for 6 weeks.What is the research hypothesis for the main effect of hours watched?

Accepted Answer

A)  On average, men and women differ in their geekiness levels. 
B)  On average, watchers differ in their geekiness levels across the various hours of the Syfy channel watched. 
C)  On average, watchers are equally geeky regardless of the hours of the Syfy channel they watch. 
D)  On average, men are geekier than women when watching fewer hours but less geeky than women when watching more hours of the Syfy channel. 
A)  On average, men and women differ in their geekiness levels. 
B)  On average, watchers differ in their geekiness levels across the various hours of the Syfy channel watched. 
C)  On average, watchers are equally geeky regardless of the hours of the Syfy channel they watch. 
D)  On average, men are geekier than women when watching fewer hours but less geeky than women when watching more hours of the Syfy channel.

Question 10

An effect size of 0.131 for a two-way ANOVA is considered to be:

Accepted Answer

A)  small. 
B)  medium. 
C)  large. 
D)  an error. 
A)  small. 
B)  medium. 
C)  large. 
D)  an error.

Question 11

The owners of the Syfy channel are interested in whether watching the Syfy channel causes people to become "geeky," and whether any such effects depend on a person's gender.They hire a researcher to design and carry out the appropriate study.The researcher randomly assigns an equal number of men and women to watch 0, 3, 5, or 9 hours of the Syfy channel each week for 6 weeks.How many cells does this study have?

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
A)  2 
B)  4 
C)  6 
D)  8

Question 12

One benefit of using a multifactorial ANOVA with two or more factors is that it can detect _____ among the variables, whereas multiple direct comparisons of means cannot.

Accepted Answer

A)  violations of assumptions 
B)  interactions 
C)  a main effect 
D)  significant differences 
A)  violations of assumptions 
B)  interactions 
C)  a main effect 
D)  significant differences

Question 13

Which source of variability does not require the grand mean in its calculation?

Accepted Answer

A)  between-groups sum of squares 
B)  within-groups sum of squares 
C)  sum of squares for the interaction 
D)  total sum of squares 
A)  between-groups sum of squares 
B)  within-groups sum of squares 
C)  sum of squares for the interaction 
D)  total sum of squares

Question 14

A significant interaction found in a two-way between-groups ANOVA trumps any main effects.

Accepted Answer

A) True 
 B)False

Question 15

An interaction occurs when:

Accepted Answer

A)  the dependent variable does not depend on any of the independent variables. 
B)  two independent variables both influence the dependent variable. 
C)  the effects of one independent variable depend on the level of the other independent variable. 
D)  a single independent variable changes the dependent variable, disregarding all other variables in the study. 
A)  the dependent variable does not depend on any of the independent variables. 
B)  two independent variables both influence the dependent variable. 
C)  the effects of one independent variable depend on the level of the other independent variable. 
D)  a single independent variable changes the dependent variable, disregarding all other variables in the study.

Question 16

Roediger and Karpicke (2006) investigated whether the test-enhanced learning effect (the demonstration that repeated testing improves memory for material) was due merely to repeated exposure to material.They randomly assigned participants to one of two study conditions (study-study or study-test) and to one of three retention interval conditions (final test at a delay of 5 minutes, 2 days, or 1 week).The dependent variable was the proportion of idea units recalled from an encyclopedia passage.How should the analysis of these data be labeled?

Accepted Answer

A)  4 × 2 between-groups ANOVA 
B)  2 × 3 within-groups ANOVA 
C)  2 × 3 between-groups ANOVA 
D)  2 × 2 within-groups ANOVA 
A)  4 × 2 between-groups ANOVA 
B)  2 × 3 within-groups ANOVA 
C)  2 × 3 between-groups ANOVA 
D)  2 × 2 within-groups ANOVA

Question 17

The owners of the Syfy channel are interested in whether watching the Syfy channel causes people to become "geeky," and if so, whether any such effects depend on a person's gender.They hire a researcher to design and carry out the appropriate study.The researcher randomly assigns an equal number of men and women to watch 0, 3, 5, or 9 hours of the Syfy channel each week for 6 weeks.What is the null hypothesis for the interaction effect?

Accepted Answer

A)  Men and women are equally geeky, regardless of the hours of the Syfy channel they watched. 
B)  The effect of geekiness is not dependent on hours of the Syfy channel watched. 
C)  The effect of geekiness is not dependent on the gender of the Syfy channel watcher. 
D)  The effect of hours of the Syfy channel watched is not dependent on gender. 
A)  Men and women are equally geeky, regardless of the hours of the Syfy channel they watched. 
B)  The effect of geekiness is not dependent on hours of the Syfy channel watched. 
C)  The effect of geekiness is not dependent on the gender of the Syfy channel watcher. 
D)  The effect of hours of the Syfy channel watched is not dependent on gender.

Question 18

For the data in the incomplete source table, what is the value of F for the first source, paint color? $$\begin{array} { | l | c | c | c | c } 
\hline \text { Source } & S S & d f & M S & F \
\hline \text { Paint Color } & 3.5 & 3 & 1.167 & \
\hline \text { Light Condition } & 1.1 & 2 & & \
\hline \text { Paint } \times \text { Light } & 2.2 & 6 & & \
\text { Within } & 17.0 & 48 & 0.354 & \
\text { Total } & 23.8 & 59 & &
\end{array}$$

Accepted Answer

A)  1.554 
B)  1.036 
C)  3.30 
D)  0.55 
A)  1.554 
B)  1.036 
C)  3.30 
D)  0.55

Question 19

A two-way between-groups ANOVA has three hypotheses.

Accepted Answer

A) True 
 B)False

Question 20

A 3 × 4 ANOVA will have 12 cells.

Accepted Answer

A) True 
 B)False

In a two-way ANOVA, if there is a significant interaction:

When performing a two-way between-groups ANOVA, effect size is measured using _, and it is calculated for _ effects.

It is helpful to represent the main effects and interactions of a factorial ANOVA graphically in a bar graph because when lines are drawn to connect the bars, they will be _ if there is a main effect and _ if there is an interaction.

In a table depicting the cells of a two-way ANOVA, the marginal means reflect:

An effect size of 0.131 for a two-way ANOVA is considered to be:

One benefit of using a multifactorial ANOVA with two or more factors is that it can detect _____ among the variables, whereas multiple direct comparisons of means cannot.

Which source of variability does not require the grand mean in its calculation?

A significant interaction found in a two-way between-groups ANOVA trumps any main effects.

An interaction occurs when:

For the data in the incomplete source table, what is the value of F for the first source, paint color? Source SS df MS F Paint Color 3.5 3 1.167 Light Condition 1.1 2 Paint \times Light 2.2 6 Within 17.0 48 0.354 Total 23.8 59

A two-way between-groups ANOVA has three hypotheses.

A 3 × 4 ANOVA will have 12 cells.

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 14: Two-Way Between-Groups Anova

In a two-way ANOVA, if there is a significant interaction:

When performing a two-way between-groups ANOVA, effect size is measured using _____, and it is calculated for _____ effects.

It is helpful to represent the main effects and interactions of a factorial ANOVA graphically in a bar graph because when lines are drawn to connect the bars, they will be _____ if there is a main effect and _____ if there is an interaction.

In a table depicting the cells of a two-way ANOVA, the marginal means reflect:

An effect size of 0.131 for a two-way ANOVA is considered to be:

One benefit of using a multifactorial ANOVA with two or more factors is that it can detect _____ among the variables, whereas multiple direct comparisons of means cannot.

Which source of variability does not require the grand mean in its calculation?

A significant interaction found in a two-way between-groups ANOVA trumps any main effects.

An interaction occurs when:

For the data in the incomplete source table, what is the value of F for the first source, paint color? Source SS df MS F Paint Color 3.5 3 1.167 Light Condition 1.1 2 Paint \times Light 2.2 6 Within 17.0 48 0.354 Total 23.8 59

A two-way between-groups ANOVA has three hypotheses.

A 3 × 4 ANOVA will have 12 cells.

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

When performing a two-way between-groups ANOVA, effect size is measured using _, and it is calculated for _ effects.

It is helpful to represent the main effects and interactions of a factorial ANOVA graphically in a bar graph because when lines are drawn to connect the bars, they will be _ if there is a main effect and _ if there is an interaction.