Project #12704 - assignment

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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