The table to the right shows the results of a survey in which 400 adults from th

Question

The table to the right shows the results of a survey in which 400 adults from the East, 400 adults from theSouth, 400 adults from the Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Complete parts (a) and (b).

Adults who say that traffic congestion is a serious problem

East

37%

South

31%

Midwest

25%

West

54%

The table to the right shows the results of a survey in which 400 adults from the East, 400 adults from theSouth, 400 adults from the Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Complete parts (a) and (b).

Adults who say that traffic congestion is a serious problem

East

37%

South

31%

Midwest

25%

West

54%

Explanation / Answer

Although the question is missing, i guess it asks for 95% confidence interval for two of the given places. 95% confidence interval for all 4 are:

95% confidence interval for east: (0.323, 0.417)

For south: (0.265, 0.355)

For Midwest: (0.208, 0.292)

For west: (0.491, 0.589)

You can plug in the numbers of two of them whichever has been asked.

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