Find the sample size needed to estimate the percentage of adults who have consulted furtune tellers. Use a 0.3 margin of error, use a confidence level of 98% and use results from prior Pew Research Center poll suggesting that 15% of adults have conculted fortune tellers.

2. YEARS IN COLLEGE: Listed below are the numbers of years it took for a random sample of college students to earn bachelors's degree( based on datafrom the national Center for education Statistics). Construct a 90% confidence interval estimate of the mean time required for all college students to earn bachelor's degrees. Does the confidence interval contain the value of 4 years? Is there anthing about the data that would suggest that the confidence interval might not be a good result?

4, 4, 4, 4, 4, 4, 4.5, 4.5, 4.5, 4.5, 4.5, 4.5, 6, 6, 8, 9, 9, 13, 13, 15.

3. AGES OF RACE CARS DRIVERS: Listed below are the ages (years)of randomly selected race car drivers(based on data reported in USA Today). Construct a 98% confidence interval estimate of the mean age of all race car drivers.

32, 32, 33, 33, 41, 29, 38, 32, 33, 23, 27, 45, 52, 29, 25..

Subject | Mathematics |

Due By (Pacific Time) | 09/18/2013 12:00 am |

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