SOLUTION: For each question determine if the situation refers to a mean or a proportion and indicate it by highlighting your choice then, solve each problem accordingly. Each question is w

Question 1056846: For each question determine if the situation refers to a mean or a proportion and indicate it by highlighting your choice then, solve each problem accordingly.
Each question is worth 10 points, 2 points for the correct choice and 8 points for the correct answer.
1. Find the sample size needed to estimate the percentage of republicans among registered voters in California. Use a 0.03 margin of error; use a confidence level of 90%.
Mean Proportion
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the sample size needed to estimate the percentage of republicans among registered voters in California. Use a 0.03 margin of error; use a confidence level of 90%.
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Percentage is a proportion.
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Since E = z*sqrt(pq/n)
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n = (z/E)^2*p*q = (1.645/0.03)^2*(1/2)(1/2) = 752 when rounded up
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Cheers,
Stan H.
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