Question

Determine the sample size necessary to estimate a population proportion to within 0.02 with 98% confidence...

Determine the sample size necessary to estimate a population proportion to within 0.02 with 98% confidence assuming that

  1. You have no knowledge of the approximate value of the population proportion.
  2. You have some idea about the population proportion and believe it to be approximately 0.4.
Math   Statistics-And-Probability   
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Answer #1

Solution:

We are given:

Confidence level = 98%

Margin of error = 0.02

a. You have no knowledge of the approximate value of the population proportion.

Answer: The formula for finding the sample size is:

b. You have some idea about the population proportion and believe it to be approximately 0.4.

Answer: The formula for finding the sample size is:

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