A consumer advocate group wants to determine if the thee leading brands of aspirin are really different from each other in terms of speed of relief. Consumers have been randomly selected and assigned to use either brand A,brand B,or brand C. Each subject was instructed to take the recommended dosage when a headache began, and each subject was told to record the number of minutes that elapsed before relief occurred. The following data (in minutes) have been gathered
Conduct an analysis of variance at 0.05 Is there a significant difference in speed of relief?