A researcher wishes to try three different techniques to lower the blood pressure of individuals diagnosed with high blood pressure. Fifteen subjects are randomly assigned to three groups: the first group takes medication, the second group exercises, and the third group follows a special diet. Each group is assigned five subjects. After four weeks, the reduction in each person’s blood pressure is recorded. The data collected are shown in the table. Test the claim that there is no difference am
A researcher wishes to try three different techniques to lower the blood pressure of individuals diagnosed with high blood pressure. Fifteen subjects are randomly assigned to three groups: the first group takes medication, the second group exercises, and the third group follows a special diet. Each group is assigned five subjects. After four weeks, the reduction in each person’s blood pressure is recorded. The data collected are shown in the table. Test the claim that there is no difference among means at α=0.05.
| Medication | Exercise | Diet |
| 6 | 10 | 7 |
| 14 | 10 | 6 |
| 15 | 9 | 5 |
| 14 | 5 | 8 |
| 13 | 6 | 6 |
1. What is the null and alternative hypothesis?
2. In the decision rule: Reject H0 if Fc>F0.05,(A,B)=C .Otherwise, fail to reject H0.
a. What is the value for df for treatments, A?
b. What is the value for df for error, B?
c. What is the critical value, C?
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