Question: Construct a 95% confidence interval for the population proportion of adults (a) From the South who say that traffic congestion is a serious problem. (b)

Construct a 95% confidence interval for the population proportion of adults

(a) From the South who say that traffic congestion is a serious problem.

(b) From the West who say that traffic congestion is a serious problem.

Use the figure, which shows the results of a survey in which separate samples of 400 adults each from the East, South, Midwest, and West were asked whether traffic congestion is a serious problem in their community.

Bad Traffic Congestion? Adults who say that traftic congestion is a serious problem East South Midwest West 36% 326 26% 56%

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