A researcher wishes to try three different techniques to lower the blood pressure of individuals with high blood pressure. The subjects are randomly selected and assigned to three groups; the first group takes medication, the second group exercises, the third group follows a special diet. After 4 weeks, the reduction in each person's blood pressure is recorded. At { = 0.05, test the claim that there is no difference among the means.
Medication Exercise Diet
10 6 5
12 8 9
9 3 12
15 0 8
13 24