Mr. Rogers - AP Statistics Objectives
 Unit Plan Ch10 Unit Plan Ch 11 Unit Plan Ch12 Practice Test Standards
 AP Statistics Errors and Hypothesis Testing Practice Test 1 ) For a two tailed test with a p=.02, What is the area under the curve associated with p in one of the tails? 2 ) If a confidence interval is tripled, what is the effect on the margin of error? 3 ) If the sample size is increased by a factor of 16, what is the effect on the margin of error? 4 ) If the confidence level is changed from 90% to 95% what is the effect on the margin of error? (assume z-test) 5 ) What conditions must be met in order to use a t-test? 6 ) For a given test of statistical significance alpha = .02 and the p-value = .025. What can you conclude? 7 ) Juan obtains a p-value = .018 in his significance test. How should he interpret it? 8 ) A two tailed quality assurance test has an alpha = 5%. What is the probability of a type I error? 9 ) For a quality assurance test what does a type I error mean? 10 ) Which hypothesis is assumed to be true when evaluating the probability of a type I error? 11 ) What is the sum of the probability of a type I and type II error for a given set of circumstances? 12 ) What is the sum of the probability of a type II error and power for a given set of circumstances? 13 ) When is a pooled t-test used? 14 ) In the American justice system, the presumption of innocence until proven guilty can be called the _________________. 15 ) What type of test should be performed to evaluate the data for a matched pairs study. 16 ) A survey of 500 men in Georgia finds that 52% prefer ketchup to mustard while a similar survey in SC with a sample size of 600 says 51% of men prefer ketchup to mustard. Construct a 95% confidence interval for the difference between men from Georgia and SC regarding their ketchup to mustard preferences. 17 ) Is there a statistically significant difference between the two groups in the problem above? 18 ) Women from Georgia weigh 102 lbs on average with an s = 8 lbs based on a sample size of 157. Women from SC weigh 100 lbs on average with an s = 6 lbs based on a sample size of 170. Is there a difference in the weight between the two groups.