Exam 13: The One-Way Analysis of Variance

An educational psychologist is interested in determining whether attitudes toward school change with age.She randomly selects 30 seventh-graders,30 ninth-graders,and 30 eleventh-graders and administers a "Do you like school?" test.How many factors does this experiment have?

In computing an ANOVA,which of the following is not one of the calculations?

Differences in scores produced by the independent variable corresponds with which of the following ANOVA terms?

Jessica is conducting a research study as part of her company's risk management program.She has collected data on the number of accidents reported during the past year in each of the company's 3 work shifts.Because reports were not available for each shift every day, and .She has calculated that and .What is ?

Corey is researching the effect of memory-enhancing,memory-impairing,and memory- neutral drugs on the ability of rats to run a maze.He has a total of 45 rats available for his study.He randomly assigns an equal number of rats to each treatment condition.If he calculates his and what is his ?

In a one-way between-subjects ANOVA,the mean squares between groups ( )describes

If what is the confidence interval?

When is not significant,

When is false, will be _____ .

Using the following ANOVA summary table,compute .

When is true, should be

Which of the following is one of the assumptions we make when we do a one-way,between-subjects ANOVA?

In an experiment on the effect of caffeine on time to complete a manual task,Paolo has three treatments-0 mg,150 mg,and 300 mg of caffeine.He randomly assigns an equal number of 39 participants to his 3 conditions.If he calculates and ,what is his ?

In an analysis of variance,we assume that the variability of scores within a condition ( )remains the same

An experimenter studies the effect of type of music during practice on recall of word lists using rock background music for 20 subjects,classical music for 22 others,and country/western for another 25.What kind of experimental design is this?

In an experiment on the effect of caffeine on time to complete a manual task,Paolo has three treatments-0 mg,150 mg,and 300 mg of caffeine.He randomly assigns an equal number of 39 participants to his 3 conditions.If he calculates , and ,what is his ?

For Joan's doctoral dissertation experiment,15 wheelchair users were randomly assigned to three groups with 5 in each group.These participants navigated in virtual-reality settings.Group 1 participants were in the virtual-reality setting (a building)as wheelchair users.Group 2 participants were in the virtual-reality setting in a wheelchair pushed by a walking person.Group 3 participants walked without aid in the virtual-reality setting.Joan measured the time each participant needed to complete the navigation of the virtual-reality setting.What are the dependent and independent variables?

Which of the following is the desired outcome of an ANOVA?

An independent variable that is studied using related samples in all conditions is called a

We perform ANOVA instead of multiple t-tests because with ANOVA the experimentwise error rate will