Average systolic blood pressure of a normal male is supposed to be about 129. Measurements of systolic blood pressure on a sample of 12 adult males from a community whose dietary habits are suspected...

Average systolic blood pressure of a normal male is supposed to be about 129. Measurements of systolic blood pressure on a sample of 12 adult males from a community whose dietary habits are suspected of causing high blood pressure are listed below:

115 134 131 143

130 154 119 137

155 130 110 138

Do the data justify the suspicions regarding the blood pressure of this community? (Use α = 0:01.)