Exam 11: Analysis of Variance

Refer to the following output (some information is missing).The sample size was n = 65 in a one-factor ANOVA. At α = .05,which is the critical value of the test statistic for a two-tailed test for a significant difference in means that are to be compared simultaneously? Note: This question requires a Tukey table.

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA table Our decision about the hypothesis of equal treatment means is that the null hypothesis

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA Table Using Appendix F,the 5 percent critical value for the F-test is approximately

Variation "within" the ANOVA treatments represents

To compare the cost of three shipping methods,a random sample of four shipments is taken for each of three firms.The cost per shipment is shown below. The degrees of freedom for the total sum of squares in a one-factor ANOVA would be

In a one-factor ANOVA,the total sum of squares is equal to

Which Excel function gives the right-tail p-value for an ANOVA test with a test statistic Fcalc = 4.52,n = 29 observations,and c = 4 groups?

ANOVA is used to compare

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA Table The number of observations in the original sample was

Refer to the following output (some information is missing).The sample size was n = 24 in a one-factor ANOVA. Which pairs of meds differ at α = .05? Note: This question requires access to a Tukey table.

Hartley's test measures the equality of the means for several groups.

Tukey's test with seven groups would entail 21 comparisons of means.

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA table The 5 percent critical value for the F test is

Sample sizes must be equal in one-factor ANOVA.

Tukey's test is similar to a two-sample t-test except that it pools the variances for all c samples.

To compare the cost of three shipping methods,a random sample of four shipments is taken for each of three firms.The cost per shipment is shown below. In a one-factor ANOVA,the degrees of freedom for the between-groups sum of squares will be

The Internal Revenue Service wishes to study the time required to process tax returns in three regional centers.A random sample of three tax returns is chosen from each of three centers.The time (in days)required to process each return is recorded as shown below. The appropriate test to use to compare the means for all three groups would be

What is the .05 critical value of Hartley's test statistic for a one-factor ANOVA with n1 = 5,n2 = 8,n3 = 7,n4 = 8,n5 = 6,n6 = 8? Note: This question requires access to a Hartley table.

Prof.Gristmill sampled exam scores for five randomly chosen students from each of his two sections of ACC 200.His sample results are shown. He could test the population means for equality using

The Kruskal-Wallis test is useful in finance or marketing,because normal populations can rarely be assumed for financial or marketing data.