Question 1

An effect size of 0.02 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. A

Question 2

In a _____, the strength of the effect varies under certain conditions, but not the _____.

Accepted Answer

A)  hypothesis test; effect size 
B)  effect size; z score 
C)  quantitative interaction; direction 
D)  qualitative interaction; F statistic 
A)  hypothesis test; effect size 
B)  effect size; z score 
C)  quantitative interaction; direction 
D)  qualitative interaction; F statistic C

Question 3

A student researcher conducts a study that is analyzed using a two-way between-groups ANOVA.Unfortunately, none of the three F statistics were statistically significant.The student is confident that there is something to her research question, and she wonders if she simply didn't collect enough data to detect anything.She computes effect size measures and gets the following values: 0.012 for the first main effect, 0.073 for the second main effect, and 0.0017 for the interaction.If she were to conduct additional research, what would you recommend she pursue?

Accepted Answer

A)  the interaction because it has a strong effect size 
B)  the first main effect because it has a small effect size 
C)  the second main effect because it has a medium effect size 
D)  the interaction because its significance would overshadow both main effects 
A)  the interaction because it has a strong effect size 
B)  the first main effect because it has a small effect size 
C)  the second main effect because it has a medium effect size 
D)  the interaction because its significance would overshadow both main effects C

Question 4

Dore is measuring the effects of three different therapy techniques on several dependent variables, including scores on a variety of scales measuring depression, anxiety, life satisfaction, and self-image.What type of statistical analysis should she perform?

Accepted Answer

A)  two-way ANOVA 
B)  MANOVA 
C)  ANCOVA 
D)  MANCOVA 
A)  two-way ANOVA 
B)  MANOVA 
C)  ANCOVA 
D)  MANCOVA

Question 5

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 asks an equal number of men and women to watch 0, 3, 5, and 9 hours of the Syfy channel each week for 6 weeks.At the end of each week, the researcher measures the "geekiness" of the men and women on a scale from 1 to 10.How should the researcher label the ANOVA used to analyze the data?

Accepted Answer

A)  a 2 × 4 × 6 mixed-design ANOVA 
B)  a 2 × 4 × 6 mixed-design MANOVA 
C)  a 4 × 2 within-groups ANOVA 
D)  a 2 × 2 mixed-design ANOVA 
A)  a 2 × 4 × 6 mixed-design ANOVA 
B)  a 2 × 4 × 6 mixed-design MANOVA 
C)  a 4 × 2 within-groups ANOVA 
D)  a 2 × 2 mixed-design ANOVA

Question 6

In a two-way ANOVA, the researcher makes decisions regarding _____ null hypotheses.

Accepted Answer

A)  three separate 
B)  two separate 
C)  three interdependent 
D)  two interdependent 
A)  three separate 
B)  two separate 
C)  three interdependent 
D)  two interdependent

Question 7

Forys and Dahlquist (2007) investigated the effects of coping style and cognitive strategy on dealing with pain.Participants were first classified as having a monitoring or avoiding coping style.Participants were then randomly assigned to one of two cognitive strategy conditions, distraction or sensation monitoring.Participants were next instructed to use the cognitive strategy while submerging their hand in ice water.The researchers measured pain tolerance as the number of seconds participants were able to keep their hand in the ice water.How should the ANOVA used to analyze the data be labeled?

Accepted Answer

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

Question 8

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 main effect of gender?

Accepted Answer

A)  On average, men and women are equally geeky. 
B)  On average, men are geekier than women. 
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 are equally geeky. 
B)  On average, men are geekier than women. 
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 9

A two-way factorial experimental design yields no more information than two single-factor experiments.

Accepted Answer

A) True 
 B)False

Question 10

The correct formula for calculating the total sum of squares is:

Accepted Answer

A)  $ \Sigma$(N - 1)/2. 
B)  $ \Sigma$(X - GM)2. 
C) $ \Sigma$(X - GM)/(N - 1). 
D)  $ \Sigma$(X - GM)/N. 
A)  $ \Sigma$(N - 1)/2. 
B)  $ \Sigma$(X - GM)2. 
C) $ \Sigma$(X - GM)/(N - 1). 
D)  $ \Sigma$(X - GM)/N.

Question 11

The effect size measure for a two-way between-groups ANOVA is R2, the same as for a one-way ANOVA.

Accepted Answer

A) True 
 B)False

Question 12

A researcher sets up a study to examine how lecture comprehension of college students is affected by lecture type (history, psychology, statistics, or English), classroom size (large or small), presentation method (blackboard, overhead projector, or computer), and instructor (graduate student, assistant professor, or full professor).How is the design described?

Accepted Answer

A)  1 × 1 × 1 × 1 within-groups ANOVA 
B)  4 × 1 between-groups ANOVA 
C)  4 × 2 × 3 × 3 within-groups ANOVA 
D)  4 × 2 × 3 × 3 between-groups ANOVA 
A)  1 × 1 × 1 × 1 within-groups ANOVA 
B)  4 × 1 between-groups ANOVA 
C)  4 × 2 × 3 × 3 within-groups ANOVA 
D)  4 × 2 × 3 × 3 between-groups ANOVA

Question 13

Interactions are evident in parallel lines in a bar graph of the cell means.

Accepted Answer

A) True 
 B)False

Question 14

Main effects refer to the:

Accepted Answer

A)  combined effects of two dependent variables. 
B)  combined effects of two independent variables. 
C)  effect of one level of the independent variable on the dependent variable, disregarding other levels of the independent variable. 
D)  effect of a single independent variable on the dependent variable, disregarding all other variables in the study. 
A)  combined effects of two dependent variables. 
B)  combined effects of two independent variables. 
C)  effect of one level of the independent variable on the dependent variable, disregarding other levels of the independent variable. 
D)  effect of a single independent variable on the dependent variable, disregarding all other variables in the study.

Question 15

A 3 × 4 ANOVA will have 7 cells.

Accepted Answer

A) True 
 B)False

Question 16

Mike wants to test how different levels of verbal ability and math ability influence a measure of reading comprehension and a measure of graph interpretation.He is concerned that IQ may confound the results since it is likely to have an effect, too.What test should he use to account for this third variable?

Accepted Answer

A)  factorial ANOVA 
B)  MANOVA 
C)  ANCOVA 
D)  MANCOVA 
A)  factorial ANOVA 
B)  MANOVA 
C)  ANCOVA 
D)  MANCOVA

Question 17

A researcher is interested in whether circadian rhythms influence participants' performance on different kinds of memory tests.The researcher first classifies participants according to whether each is a morning person or an evening person.The researcher then randomly assigns participants to receive either an implicit memory test or an explicit memory test.The researcher then tests everyone at 8 a.m.What is(are) the main effect(s) being tested in the study?

Accepted Answer

A)  type of person 
B)  memory test 
C)  type of person and performance 
D)  type of person and memory test 
A)  type of person 
B)  memory test 
C)  type of person and performance 
D)  type of person and memory test

Question 18

A factor is another word to describe the independent variable in a two-way ANOVA.

Accepted Answer

A) True 
 B)False

Question 19

A bar graph displays the mean scores on a test of mental rotation for students majoring in psychology or chemistry who have either high or low spatial abilities.Psychology and chemistry students with low spatial skills scored about 35 percent correct on the mental rotation test, while psychology and chemistry students with high spatial skills scored about 70 percent correct.What can be inferred from these data?

Accepted Answer

A)  There is an interaction between spatial ability and college major. 
B)  There appears to be a main effect of mental rotation only. 
C)  There appears to be a main effect of college major only. 
D)  There appears to be a main effect of spatial ability only. 
A)  There is an interaction between spatial ability and college major. 
B)  There appears to be a main effect of mental rotation only. 
C)  There appears to be a main effect of college major only. 
D)  There appears to be a main effect of spatial ability only.

Question 20

A hypothesis test with two nominal independent variables and a scale dependent variable is a:

Accepted Answer

A)  one-way ANOVA. 
B)  two-way ANOVA. 
C)  two-groups t test. 
D)  two-groups z test. 
A)  one-way ANOVA. 
B)  two-way ANOVA. 
C)  two-groups t test. 
D)  two-groups z test.

An effect size of 0.02 for a two-way ANOVA is considered to be:

In a _, the strength of the effect varies under certain conditions, but not the _.

Dore is measuring the effects of three different therapy techniques on several dependent variables, including scores on a variety of scales measuring depression, anxiety, life satisfaction, and self-image.What type of statistical analysis should she perform?

In a two-way ANOVA, the researcher makes decisions regarding _____ null hypotheses.

A two-way factorial experimental design yields no more information than two single-factor experiments.

The correct formula for calculating the total sum of squares is:

The effect size measure for a two-way between-groups ANOVA is R², the same as for a one-way ANOVA.

Interactions are evident in parallel lines in a bar graph of the cell means.

Main effects refer to the:

A 3 × 4 ANOVA will have 7 cells.

A factor is another word to describe the independent variable in a two-way ANOVA.

A hypothesis test with two nominal independent variables and a scale dependent variable is a:

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

An effect size of 0.02 for a two-way ANOVA is considered to be:

In a _____, the strength of the effect varies under certain conditions, but not the _____.

Dore is measuring the effects of three different therapy techniques on several dependent variables, including scores on a variety of scales measuring depression, anxiety, life satisfaction, and self-image.What type of statistical analysis should she perform?

In a two-way ANOVA, the researcher makes decisions regarding _____ null hypotheses.

A two-way factorial experimental design yields no more information than two single-factor experiments.

The correct formula for calculating the total sum of squares is:

The effect size measure for a two-way between-groups ANOVA is R2, the same as for a one-way ANOVA.

Interactions are evident in parallel lines in a bar graph of the cell means.

Main effects refer to the:

A 3 × 4 ANOVA will have 7 cells.

A factor is another word to describe the independent variable in a two-way ANOVA.

A hypothesis test with two nominal independent variables and a scale dependent variable is a:

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

In a _, the strength of the effect varies under certain conditions, but not the _.

The effect size measure for a two-way between-groups ANOVA is R², the same as for a one-way ANOVA.