Conducted on the president performance

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Reference no: EM131899690

(a) A poll of 2,228 likely voters was conducted on the president’s performance. Approximately what margin of error would the approval rating estimate have if the confidence level is 95%? (Round your answer to 4 decimal places.)

Margin of error

(b) The poll showed that 44 percent approved the president’s performance. Construct a 90 percent confidence interval for the true proportion. (Round your answers to 4 decimal places.)

The 90% confidence interval to

No, the confidence interval does not contain .50.

Yes, the confidence interval contains .50.

Reference no: EM131899690

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