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A poll of 3,200 voters were asked what they thought the most significant issue was in...

A poll of 3,200 voters were asked what they thought the most significant issue was in the upcoming election. Sixty-eight percent answered the economy.

a) Construct a 90% confidence interval for the population proportion of voters who feel the economy is the most important issue. Write a complete sentence describing the meaning of this confidence interval.

b) Construct a 95% confidence interval for the population proportion of voters who feel the economy is the most important issue. Write a complete sentence describing the meaning of this confidence interval.

c) Explain, using complete sentences, why the confidence interval in part b) is wider.

Math   Statistics-And-Probability   
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