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 test to use to compare the means for all three groups would require:
A) three-factor ANOVA.
B) one-factor ANOVA.
C) repeated two-sample test of means.
D) two-factor ANOVA with replication.

Question

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 test to use to compare the means for all three groups would require:
A) three-factor ANOVA. 
B) one-factor ANOVA. 
C) repeated two-sample test of means. 
D) two-factor ANOVA with replication.

Quizplus · Accepted Answer

One-factor ANOVA is the appropriate test for comparing the means of three or more groups. It is designed to test whether there is a significant difference in the means of the groups being compared. The data provided in the question is structured for one-factor ANOVA.

The Internal Revenue Service Wishes to Study the Time Required