1. In a Gallup poll of 1,500 Americans in 1975 (from Gallup Opinion Index, October 1975), 45% answered "yes" to the question "Is there any area right around here-that is , within a mile-where you would be afraid to walk alone at night?" In a similar 1972 poll of 1,500 Americans, only 42% answered "yes." (a) (10 pts) Test whether more people are afraid to walk alone at night in 1975 than in 1972 at the 5% level. In carrying out your test, be sure to state your null and alternative hypothesis, compute the test statistic, and state your conclusions, both in terms of the hypotheses and in terms of the