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A political candidate has asked you to conduct a poll to determine what percentage of people support him. If thecandidate only wants a 5% margin of error at a 99.5% confidence level, what size of sample is needed?

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A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the
candidate only wants a 5% margin of error at a 99.5% confidence level, what size of sample is needed?
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A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 5% margin of error at a 99.5% confidence level, what size of sample is needed?

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Step 1

In this question, It has been given that Margin of error = 0.05 and level of significance = 0.005. Using this we have to find the sample size.

Step 2

The complete calculation for confidenceinterval is given on whiteboard.

The value at 0.005 for two tailed which ultimately at 0.0025 is not given in table “Percentage poin...

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