A survey of households in a small town showed that in 500 of 1,200 sampled households, at least one member attended a town meeting during the year. Using the 95% level of confidence, what is the confidence interval for the proportion of households represented at a town meeting?

Answer 1

Phat = 500/1200
phat =0.4167
E = 1.96 * sqrt(.4167*.5833/1200)
E = 0.0279
0.4167 -+ 0.0279
[0.3888, 0.4446]

Answer 2

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