There are four auto body shops in Bangor, Maine, and all claim to promptly repair cars. To

Question:

There are four auto body shops in Bangor, Maine, and all claim to promptly repair cars. To check if there is any difference in repair times, customers are randomly selected from each repair shop and their repair times in days are recorded. The output from a statistical software package is:

Summary Groups Sample Size Sum Average Variance Ray's Auto Body Downeast Auto Body East Coast Auto Body 3 15.4 5.133333 0.323333 4 32 1.433333 25.2 5.04 0.748 Maine Collision Center 4 25.9 6.475 0.595833 ANOVA Source of Variation S df MS p-value Between Groups Within Groups 23.37321 3 7.791069 9.612506