Population proportion at the given level of confidence

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1. How do you construct a confidence interval of the population proportion at the given level of confidence?

x=105, n=150, 95% confidence

The 95?% confidence interval is ? ?

2. How do you construct a confidence interval of the population proportion at the given level of confidence?

x=120, n=200, 99% confidence

The 99% confidence interval is

3. 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 0.02 with 99?% confidence if

?(a) she uses a previous estimate of 0.34

?(b) she does not use any prior? estimates?

Reference no: EM132279457

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