Alice wants to estimate the percentage of people who plan on voting yes for the upcoming school levy. She surveys 380 individuals and finds that 260 plan on voting yes. Identify the values needed to calculate a confidence interval at the 90% confidence level. Then find the confidence interval.   z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576   Use the table of common z-scores above. Round the final answer to three decimal places. Provide your answer below:   $p'=\ $p′= ​  $\sigma_{p'}\ =\ $σp′​ = ​  $z_{\frac{\alpha}{2}}\ =\ $zα2​​ = ​  (, )

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Alice wants to estimate the percentage of people who plan on voting yes for the upcoming school levy. She surveys 380 individuals and finds that 260 plan on voting yes.

Identify the values needed to calculate a confidence interval at the 90% confidence level. Then find the confidence interval.

 

z0.10 z0.05 z0.025 z0.01 z0.005
1.282 1.645 1.960 2.326 2.576

 

Use the table of common z-scores above.

  • Round the final answer to three decimal places.

Provide your answer below:

 

$p'=\ $p′= ​ 

$\sigma_{p'}\ =\ $σp′​ = ​ 

$z_{\frac{\alpha}{2}}\ =\ $zα2​​ = ​ 

(, )

 

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