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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?


A) 3
B) 90
C) 30
D) 1

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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 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 ? A) 59.11 B) 1.33 C) 80.00 D) 24.44 and 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 ? A) 59.11 B) 1.33 C) 80.00 D) 24.44 what is his 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 ? A) 59.11 B) 1.33 C) 80.00 D) 24.44 ?


A) 59.11
B) 1.33
C) 80.00
D) 24.44

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


A) Our group variances are significantly different.
B) Our group variances are approximately equal.
C) Our group means are significantly different.
D) Our means are approximately equal.

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When When is true, should be A) = 0.0. B) = 1.0. C) > 1.0. D) <font face= symbol ></font> 0.0. is true, When is true, should be A) = 0.0. B) = 1.0. C) > 1.0. D) <font face= symbol ></font> 0.0. should be


A) = 0.0.
B) = 1.0.
C) > 1.0.
D) 0.0.

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In a one-way between-subjects ANOVA,the mean squares between groups ( In a one-way between-subjects ANOVA,the mean squares between groups ( ) describes A) the variability of individual scores in the sample. B) an estimate of the variability of individual scores in the population. C) differences between the means as an estimate of the differences between means found in the population. D) the total variability in the population. ) describes


A) the variability of individual scores in the sample.
B) an estimate of the variability of individual scores in the population.
C) differences between the means as an estimate of the differences between means found in the population.
D) the total variability in the population.

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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?


A) One-way,between-subjects
B) One-way,within-subjects
C) Two-sample,between-subjects
D) Two-sample,within-subjects

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


A) Treatment effect
B) Factor
C) Mean square
D) Level

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If If what is the confidence interval? A) B) C) D) what is the confidence interval?


A) If what is the confidence interval? A) B) C) D)
B) If what is the confidence interval? A) B) C) D)
C) If what is the confidence interval? A) B) C) D)
D) If what is the confidence interval? A) B) C) D)

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When When is not significant, A) somewhere among the means at least two means differ significantly,but we do not know which specific means differ significantly. B) somewhere among the means at least two means differ significantly,and we know which specific means differ significantly. C) there may be significant differences between the level means. D) there are no significant differences between any of the level means. is not significant,


A) somewhere among the means at least two means differ significantly,but we do not know which specific means differ significantly.
B) somewhere among the means at least two means differ significantly,and we know which specific means differ significantly.
C) there may be significant differences between the level means.
D) there are no significant differences between any of the level means.

Correct Answer

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


A) within-subjects factor.
B) between-subjects factor.
C) level.
D) treatment.

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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 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 and 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 ,what is his 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 ?


A) 5.90
B) 27.95
C) 30.90
D) 2.95

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When When is false, will be _____ . A) less than B) greater than C) equal to D) different from is false, When is false, will be _____ . A) less than B) greater than C) equal to D) different from will be _____ When is false, will be _____ . A) less than B) greater than C) equal to D) different from .


A) less than
B) greater than
C) equal to
D) different from

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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, 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 ? A) 0.06 B) 17.45 C) 1.92 D) 58.65 and 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 ? A) 0.06 B) 17.45 C) 1.92 D) 58.65 .She has calculated that 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 ? A) 0.06 B) 17.45 C) 1.92 D) 58.65 and 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 ? A) 0.06 B) 17.45 C) 1.92 D) 58.65 .What is 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 ? A) 0.06 B) 17.45 C) 1.92 D) 58.65 ?


A) 0.06
B) 17.45
C) 1.92
D) 58.65

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Using the following ANOVA summary table,compute Using the following ANOVA summary table,compute . A) 0.29 B) 0.78 C) 0.22 D) 1.79 . Using the following ANOVA summary table,compute . A) 0.29 B) 0.78 C) 0.22 D) 1.79


A) 0.29
B) 0.78
C) 0.22
D) 1.79

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In an analysis of variance,we assume that the variability of scores within a condition ( In an analysis of variance,we assume that the variability of scores within a condition ( ) remains the same A) regardless of whether there is inherent inconsistency in any particular condition. B) only when is false. C) only when is true. D) regardless of whether is true or false. ) remains the same


A) regardless of whether there is inherent inconsistency in any particular condition.
B) only when In an analysis of variance,we assume that the variability of scores within a condition ( ) remains the same A) regardless of whether there is inherent inconsistency in any particular condition. B) only when is false. C) only when is true. D) regardless of whether is true or false. is false.
C) only when In an analysis of variance,we assume that the variability of scores within a condition ( ) remains the same A) regardless of whether there is inherent inconsistency in any particular condition. B) only when is false. C) only when is true. D) regardless of whether is true or false. is true.
D) regardless of whether In an analysis of variance,we assume that the variability of scores within a condition ( ) remains the same A) regardless of whether there is inherent inconsistency in any particular condition. B) only when is false. C) only when is true. D) regardless of whether is true or false. is true or false.

Correct Answer

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


A) Each condition contains the same number of scores.
B) The populations represented have significantly different variances.
C) All conditions of the single independent variable contain independent samples.
D) The means of the populations represented are homogeneous.

Correct Answer

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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 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 , 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 and 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 ,what is his 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 ? A) 5.90 B) 27.95 C) 30.90 D) 2.95 ?


A) 5.90
B) 27.95
C) 30.90
D) 2.95

Correct Answer

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


A) be much less than .
B) be much larger than .
C) change with each new significance test.
D) be equal to .

Correct Answer

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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?


A) Independent = wheelchair use;dependent = virtual-reality condition
B) Independent = wheelchair use;dependent = time needed
C) Independent = time needed;dependent = virtual-reality condition
D) Independent = virtual-reality condition;dependent = time needed

Correct Answer

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


A) In computing an ANOVA,which of the following is not one of the calculations? A) B) C) D)
B) In computing an ANOVA,which of the following is not one of the calculations? A) B) C) D)
C) In computing an ANOVA,which of the following is not one of the calculations? A) B) C) D)
D) In computing an ANOVA,which of the following is not one of the calculations? A) B) C) D)

Correct Answer

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