We want to investigate the proportion of the adult American who
state that the amount of tax (federal, state, property, sales, and
so on) they pay is too high. In a survey of 1200 adult Americans,
640 state that the amount of tax they pay is too high. To finish
the investigation do just one of the following.
(a) Use a 95% confidence interval to determine the proportion of
Americans that state the amount of tax they pay is too...