Question: Three exercise plans are being compared on their effects on high blood pressure. After randomly assigning the subjects with the same high blood pressure to the three groups, the experiment lasted 1 year. The blood pressure of each of the subjects was then measured and reported as follows:

Plan 1: 140 160 155 175 165 180 180 155 165 140 128 160

Plan 2: 150 160 145 150 145 150 150 150 140 145

Plan 3: 165 140 140 155 140 145 160 150 140 150

Does the data support the hypothesis that diet plan significantly affects blood pressure level at α = 0.03? Perform and report all related tests and statistics.