1. 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:
Do the data justify the suspicions regarding the blood pressure of this community? (Use α = 0.01.)
2. A public opinion poll shows that in a sample of 150 voters, 79 preferred candidate X. If X can be confident of winning, she can save campaign funds by reducing TV commercials. Given the results of the survey should X conclude that she has a majority of the votes? (Use α = 0.05.)