i Questio The table shows the results of a survey in which separate samples of 4

Question

i Questio The table shows the results of a survey in which separate samples of 400 adults each from the East, South, Bad Traffic Congestion? Midwest, and West were asked if traffic congestion is a serious problem in their community Complete parts (a and (b) ) Adults who say that traftic congestion is a serious problem 36% South Midwest West 26% (a Construct a 95% confidence interval for the proportion of adul s from the South who say tramo co gestions a serious pi tien The 95% confidence interval for the proportion o adults fro m the South who say traffic congestion is a serious problem s (Round to three decimal places as needed)

Explanation / Answer

Ans:

a)Sample proportion of people from south who says traffic congestion is serious problem,p=0.32

n=400

95% confidence interval for p

=0.32+/-1.96*sqrt(0.32*(1-0.32)/400)

=0.32+/-0.046

=(0.274, 0.366)

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