1 - A 95% confidence interval for a populationproportion was constructed using a sample proportion from a randomsample. Which of the following statements are correct? Select allthat apply.
A) We don't know if the 95% confidence interval actually does ordoesn't contain the population proportion.
B) The population proportion must lie in the 95% confidenceinterval.
C) There is a 95% chance that the 95% confidence intervalactually contains the population proportion.
D) The sample proportion must lie in the 95% confidenceinterval.
E) If we were to use a 90% confidence level, the confidenceinterval from the same data would produce an interval wider thanthe 95% confidence interval.
2 - Public Policy Polling recently conducted a surveyasking adults across the U.S. about music preferences. When asked,83 of the 574 participants admitted that they have illegallydownloaded music.
* Create a 99% confidence interval for the true proportion ofAmerican adults who have illegally downloaded music. (Round youranswers to two decimal places.)
( _____ , _____ )
You may need to use the appropriate Appendix Table to answerthis question.
* Which of the following statement is true about the confidenceinterval in part (a)?
A) This confidence interval contains the true populationproportion.
B) The sample proportion may or may not be in this confidenceinterval.
C) There is a 99% chance that the true population proportionlies in this confidence interval.
D) This confidence interval may not contain the true populationproportion.
