A survey in which 400 adults from the? East, 400 adults from the? South, 400 adults from the? Midwest, and 400adults from the West were asked if traffic congestion is a serious problem. Complete parts? (a) and? (b).
(a) Construct a? 99% confidence interval for the proportion of adults from the Midwest who say traffic congestion is a serious problem.
(b) Construct a? 99% confidence interval for the proportion of adults from the South who say traffic congestion is a serious problem. Is it possible that these two proportions are? equal? Explain your reasoning
East- 34%
South- 32%
Midwest- 27%
West- 53%