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Find a 95 confidence interval for the population proportion

Human Cloning

In a Gallup Poll, 441 of 507 adults said it was "morally wrong" to clone humans.

a. What proportion of the respondents believed it morally wrong to clone humans?

b. Find a 95% confidence interval for the population proportion who believed it is morally wrong to clone humans. Assume that Gallup used a simple random sample.

c. Find an 80% confidence interval (using a z* of 1.28 if you are calculating by hand).

d. Which interval is wider, and why?

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