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1. State the advantages and disadvantages of using confidence intervals for sta- tistical inference.

2. Two situations affect the choice of a calculation of a confidence interval: (1) the population is known; (2) the population variance is unknown. How would you calculate a confidence interval given these two different circumstances?

3. Explain the bootstrap principle. How can it be used to make statistical infer- ences?

4. How can bootstrap confidence intervals be generated? Name the simplest form of a bootstrap confidence interval. Are bootstrap confidence intervals exact?

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