When is it appropriate to use a one

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University of West Alabama *

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506

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Statistics

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Feb 20, 2024

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When is it appropriate to use a one-way ANOVA to analyze data?SelectedAnswer:When one has to compare two or more groups with respect to their means.Correct Answer:When comparing the means of three or more independent groupsQuestion 2What letter is used the designate the test statistic used in the one-way ANOVA?SelectedAnswer:FCorrect Answer:FQuestion 3What are the two types of variance that are examined when conducting an analysis of variance?SelectedAnswer:One-way Anova and two-way AnovaCorrect Answer:Between groups and within groupsQuestion 4Which type of variance is related to the effect of a treatment?SelectedAnswer:Between Subjects Sum of SquaresCorrect Answer:Between groupsQuestion 5Does the analysis of variance test differences between two specific groups?SelectedAnswer:No

CorrectAnswer:No. It determines whether a difference exists among the three or more groups butdoes not specify which groups are different.Question 6Write an appropriate null hypothesis for this analysis.SelectedAnswer:There is no significant differentiation between samples.CorrectAnswer:There will be no statistically significant difference among the three activity levelgroups with respect to exam scores.Question 7What is the observed or computed value of F?SelectedAnswer:33.76Correct Answer:F = 33.76Question 8How would you explain the procedure for determining the degrees of freedom for the BetweenGroups variance (numerator)?SelectedAnswer:1.k-1=3-1=2Correct Answer:The number of groups minus 1Question 9How would you explain the procedure for determining the degrees of freedom for the Within Groupsvariance (denominator)?SelectedAnswer:The degree of freedom within the sample is n-k=30-3=27

Correct Answer:The number of subjects minus the number of groupsQuestion 10What is the the value of the Between Groups degrees of freedom?SelectedAnswer:3Correct Answer:2 (3 groups - 1 = 2)Question 11What is the value of the Within Groups degrees of freedom?SelectedAnswer:27Correct Answer:27 (30 subjects - 3 groups = 27)Question 12What is the reported level of significance?SelectedAnswer:.001Correct Answer:p = .000Question 13Based on the reported level of significance, would you reject the null hypothesis?SelectedAnswer:Null hypothesis is rejected.Correct Answer:YesQuestion 14

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Based on the reported level of significance, would you conclude that there was a statisticallysignificant difference among the three groups?SelectedAnswer:There is statistically significant difference among the groups.Correct Answer:YesQuestion 15Write a statement as it might appear in an article that reports the results of the one-way ANOVA.SelectedAnswer:The ANOVA results indicate a statistically significant difference, F(2,27)=33.76, p <.001exists between the three groups.CorrectAnswer:The results of the one-way analysis of variance indicated that a statistically significantdifference, F(2, 27) = 33.76, p < .001, exists among the three groups.Question 16I have submitted responses to all of the questions in this exercise.SelectedAnswer:TrueCorrect Answer:TrueMonday, February 5, 2024 10:38:23 PMWrite an appropriate null hypothesis for this analysis.SelectedAnswer:There is no statistically significant difference between groups.CorrectAnswer:There will be no statistically significant difference among the three brands ofmedication with respect to the number of days before symptoms cease.Question 2

What is the mean number of days it takes for symptoms to cease for each brand?SelectedAnswer:X=22.42Y=16.33Z=17.58CorrectAnswer:M = 22.42 for Brand X M = 16.33 for Brand Y M = 17.58 for Brand ZQuestion 3What is the standard deviation of the number of days it takes for symptoms to cease for eachbrand?SelectedAnswer:X=5.60Y=6.53Z=4.25CorrectAnswer:SD = 5.60 for Brand X SD = 6.53 for Brand Y SD = 4.25 for BrandZQuestion 4What is the observed or computed value of F?SelectedAnswer:4.037CorrectAnswer:F = 4.037Question 5What are the reported degrees of freedom for the Between Groups variance?SelectedAnswer:2CorrectAnswer:df = 2Question 6What are the reported degrees of freedom for the Within Groups variance?SelectedAnswer:33CorrectAnswer:df = 33Question 7What is the reported level of significance?SelectedAnswer:.027CorrectAnswer:p = .027Question 8Based on the reported level of significance, would you reject the null hypothesis? SelectedAnswer:No, because it is > .05

CorrectAnswer:YesQuestion 9Based on the reported level of significance, would you conclude that there was a statisticallysignificant difference among the three groups?SelectedAnswer:yesCorrectAnswer:YesQuestion 10Write a statement as it might appear in an article that reports the results of the one-way ANOVA.SelectedAnswer:There is a statistically significant difference in the one-way ANOVA. F(2,27)= 4.037p< .027 exists among the three groupsCorrectAnswer:The results of the one-way ANOVA indicated a statistically significant deifference,F(2,33) = 4.037, p = .027, among the three brands of medication with respect to thenumber of days before symptoms ceased.Question 11I have submitted responses to all of the questions in this exercise.SelectedAnswer:TrueCorrectAnswer:TrueMonday, February 5, 2024 10:

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When is it appropriate to use a one

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