Q2 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. Assume that the data in each group is approximately normal. Medication group Exercise group Diet group 9 0 4 10 2 6 12 4 8 11 7 9 15 12 (a) Using a significance level of 5%, test whether there is difference in lowering the mean blood pressure of individuals using the three different techniques. (b) Give also the p-value. Does the p-value agree with your conclusion in (a)