Many people think that a national lobbys successful fight ag

Many people think that a national lobbys successful fight against gun control legislation is reflecting the will of a minority of Americans. A random sample of 4000 citizens yielded 2250 who are in favor of gun control legislation. Estimate the true proportion of all Americans who are in favor of gun control legislation using a 90% confidence interval.

Solution

(2250 plus/minus .1(2250))/4000= b b. .5625 ± .0129