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

from the South, 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%

(a) Construct a 99% confidence interval for the proportion of adults from the East who say traffic congestion is a serious problem.

The 99% confidence interval for the proportion of adults from the East who say traffic congestion is a serious problem is

(   ) , (  )

(Round to three decimal places as needed.)

(b) Construct a 99% confidence interval for the proportion of adults from the Midwest who say traffic congestion is a serious problem.  Is it possible that these two proportions are equal? Explain your reasoning.

The 99% confidence interval for the proportion of adults from the Midwest who say traffic congestion is a serious problem

(  ) , (  )

(Round to three decimal places as needed.) ATTACHMENT PREVIEW Download attachmentThe table to the right shows the results of a survey in which 400 adults from the East, 400 adults fromthe South, 400 adults from the Midwest, and 400 adults from the West were asked if traFc conges±on isa serious problem. Complete parts (a) and (b)Adults who say that traffic congestion is a serious problemEast37%South31%Midwest25%West54%(a) Construct a 99% con²dence interval for the propor±on of adults from the East who say traFcconges±on is a serious problem.The 99% con²dence interval for the propor±on of adults from the East who say traFc conges±on is aserious problem is() , ()(Round to three decimal places as needed.)(b) Construct a 99% con²dence interval for the propor±on of adults from the Midwest who say traFcconges±on is a serious problem.Is it possible that these two propor±ons are equal? Explain yourreasoning.The 99% con²dence interval for the propor±on of adults from the Midwest who say traFc conges±on isa serious problem() , ()(Round to three decimal places as needed.)

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