Select the Correct Answer

A researcher wishes to try three different techniques to lower the blood pressure of individuals diagnosed with high blood pressure. The subjects are randomly assigned to three groups; the first group takes medication, the second group exercises, and the third group follows a special diet. After four weeks, the reduction in each person's blood pressure is recorded. At a = 0.05, test the claim that there is no difference among the means. The data are shown. Medication Exercise Diet 10 12 13 - 11.8 10.3 = The critical F-value is O A. 3.89 O B. 6.93 O C. 19.413 O D. 5.10