I am confused about question 7. How should this be approached. What is the conclusion?

Ex. 7 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 five 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 below. Medication Exercise Diet 10 12 9 15 13 NOWOO 4 Ex. 8 A state employee wishes to see if there is a significant difference in the number of employees at the interchanges of three state toll roads. The data are shown. At a =0.10