Author Question: We have calculated a confidence interval based on a sample of n = 180. Now we want to get a better ... (Read 179 times)

joblessjake · **on:** Aug 30, 2019

Question 1

Which is true about a 99% confidence interval based on a given sample?
I. The interval contains 99% of the population.
II. Results from 99% of all samples will lie in this interval.
III. The interval is wider than a 95% confidence interval would be.
◦ I only
◦ III only
◦ II only
◦ none
◦ II and III only

Question 2

We have calculated a confidence interval based on a sample of n = 180. Now we want to get a better estimate with a margin of error only one third as large. We need a new sample with n at least…
◦ 312
◦ 1620
◦ 60
◦ 20
◦ 540

momolu · **Reply #1 on:** Aug 30, 2019

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