Question

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 99% confident that you esimate is within 1.5% of the true population proportion. How large of a sample size is required?

Answer #1

Preliminary estimate for proportion (Unknown) = 0.5

Margin of error =E=0.015

Level of significance = 1-0.99=0.01

Z critical value is (by using Z table)=2.58

Sample size

Therefore, sample size approximately will be 7373

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At this point in time, you have no reasonable preliminary
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You want to obtain a sample to estimate a population proportion.
At this point in time, you have no reasonable estimate for the
population proportion. You would like to be 99.5% confident that
you esimate is within 5% of the true population proportion. How
large of a sample size is required? n = Do not round
mid-calculation. However, use a critical value accurate to three
decimal places.

You want to obtain a sample to estimate a population proportion.
At this point in time, you have no reasonable estimate for the
population proportion. Your would like to be 99% confident that you
estimate is within 0.1% of the true population proportion. How
large of a sample size is required?
n =
Do not round mid-calculation. However, use a critical value
accurate to three decimal places
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Based on...

You want to obtain a sample to estimate a population proportion.
At this point in time, you have no reasonable estimate for the
population proportion. You would like to be 90% confident that your
estimate is within 0.1% of the true population proportion. How
large of a sample size is required?

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At this point in time, you have no reasonable preliminary
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