In a simple random sample of people, are left-handed. Find a confidence interval for the true proportion of left-handed people in the entire population.

In a simple random sample of people, are left-handed. Find a confidence interval for the true proportion of left-handed people in the entire population.

A health insurance executive suspects that 50% of insurance applications are incomplete (i.e. critical data is missing from the application). He wants to gather a sample to estimate the true proportion. He wants to be within 5% of the true mean with 95% confidence.

What sample size does he need?

A health insurance executive suspects that 50% of insurance applications are incomplete (i.e. critical data is missing from the application). He wants to gather a sample to estimate the true proportion. He wants to be within 5% of the true mean with 95% confidence.

What sample size does he need?