Posted by **Erin** on Wednesday, June 6, 2012 at 10:22pm.

1) Construct a confidence interval of the population proportion at the given level of confidence.

x=60,n=300, 99% confidence.

The 99% confidence interval is (_,_)

2) A researcher wishes to estimate the proportion of adults who have high-speed internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 99% confidence if

a) she uses a previous estimate of 0.52?

b) she does not use any prior estimates?

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