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If n=210 and ˆpp^ (p-hat) =0.74, find the margin of error at a 90% confidence level...

If n=210 and ˆpp^ (p-hat) =0.74, find the margin of error at a 90% confidence level

Give your answer to three decimals

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Homework Answers

Answer #1

Solution :

Given that,

Point estimate = sample proportion = = 0.74

Z/2 = 1.645

Margin of error = E = Z / 2 * (( * (1 - )) / n)

= 1.645 * (((0.74 * 0.26) / 210)

= 0.050

Margin of error = E = 0.050

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