Exam 12: Introduction to Analysis of Variance

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If one of the assumptions for the independent-measures ANOVA has been violated,you can still proceed by transforming the original scores to ranks and then using an alternative statistical analysis known as the Kruskal-Wallis test,which is designed specifically for ordinal data

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For an analysis of variance comparing three treatment means with a separate sample of n = 10 participants in each treatment,dftotal = 29.​

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On average,what value is expected for the F-ratio if the null hypothesis is true?​

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Which outcome is expected if the null hypothesis is true for an analysis of variance?​

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If an analysis of variance is used for the following data,what would be the effect of changing the value of M1 to 20?? Sample Data =15 =25 =90 =70

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F-ratios are always greater than or equal to zero.​

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A researcher reports an F-ratio with df = 1,24 for an independent-measures experiment.If all the treatments had the same number of participants,then how many individuals were in each treatment?​

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An analysis of variances produces dftotal = 29 and dfwithin = 27.For this analysis,what is dfbetween?​

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The Scheffé test uses an F-ratio to evaluate the significance of the difference between any two treatment conditions

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If an analysis of variance is used for the following data,what would be the effect of changing the value of M2 to 20?? Sample Data =10 =15 =90 =70 ??

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An analysis of variance produces SStotal = 80 and SSwithin = 30.For this analysis,what is SSbetween?​

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The F-ratio for an analysis of variance comparing three treatments with n = 10 in each treatment would have df = 2,29.

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Describe the circumstances in which post tests are used and explain why these tests are necessary.

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The following table shows the results of an analysis of variance comparing three treatment conditions with a sample of n = 10 participants in each treatment.Note that several values are missing in the table.What is the missing value for SStotal?? Source Between 20 = Within 2 Total

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In an analysis of variance,which value is determined by the size of the sample mean differences?​

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Which of the following describes a typical distribution of F-ratios?​

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An analysis of variances produces dftotal = 29 and dfwithin = 27.For this analysis,how many treatment conditions are being compared?​

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In an analysis of variance,what is measured by the MS values?​

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An analysis of variance produces SSbetween = 30,SSwithin = 60,and an F-ratio with df = 2,15.For this analysis,what is the F-ratio?​

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An analysis of variance comparing three treatment conditions produces dfwithin = 21.If the samples are all the same size,how many individuals are in each sample?​

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