A researcher wishes to try three different techniques to lower the blood pressure of individuals diagnosed...

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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 5 12 3 8 13 6 9 15 8 12 (a) Is there a significant difference between the techniques used to lower blood pressure, at a = 0.05? (b) If you find a difference, perform pairwise tests to determine where the difference lies. (Note: to save your time, in this question the qi-a value from studentized range table is 3.773.) 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 5 12 3 8 13 6 9 15 8 12 (a) Is there a significant difference between the techniques used to lower blood pressure, at a = 0.05? (b) If you find a difference, perform pairwise tests to determine where the difference lies. (Note: to save your time, in this question the qi-a value from studentized range table is 3.773.)