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Suppose a simple random sample of 4,000 Americans were surveyed and 2,200 of them said they...

Suppose a simple random sample of 4,000 Americans were surveyed and 2,200 of them said they have brown colored eyes.

a. Create a 95% confidence interval estimator for the population proportion of Americans that have brown colored eyes.

b. What is the minimum same size that would be required to estimate the population’s proportion with an error of 0.025 at a 98% level of confidence? Assume there is no point estimate.
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