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Exam 14: Two-Way Between-Groups Anova

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Question 51

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

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

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Question 52

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

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Question 53

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

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.

A 3 × 4 ANOVA will have 12 cells.

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?

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:

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?

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

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 < 0.05; the drug had a large effect on albino rats and virtually no effect on wild-bred rats, F (1, 57) = 11.01, p < 0.05.However, there was no overall difference in the time of albino rats compared to that of wild-bred rats, F (1, 57) = 1.11, p > 0.10.Which effect(s) must be present for these results to be true?

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

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?

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.

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

An interaction occurs when:

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

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?

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

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?

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?