A Newspaper Recently Conducted a Survey of a Random Sample

question 21

Essay

A newspaper recently conducted a survey of a random sample of 120 registeredvoters in order to predict the winner of a local election. The Republican candidatewas preferred by 62 of the respondents.Assuming that it is reasonable to regard the 120 voters in the sample as representativeof the population of voters, construct and interpret a 90% confidence interval for theproportion of registered voters who prefer the Republican candidate.

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