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A city council commissioned a statistician to estimate the proportion p of voters in favor of a proposal to build a new library. The statistician obtained a random sample of 200 voters, with 112 indicating approval of the proposal.
(a) What is a point estimate for p?
(b) Find a 90% confidence interval for p.
(c) What is the maximum error of estimate for p?
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A sample of 100 observations has a mean of 2.99 and a standard deviation s equal to 0.5 Conduct the following test of hypotheses about the corresponding population mean at a level of significance of α = 0.2
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