Mr. Rogers  AP Statistics Objectives

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 ztest) 
5  )  What conditions must be met in order to use a ttest? 
6  )  For a given test of statistical significance alpha = .02 and the pvalue = .025. What can you conclude? 
7  )  Juan obtains a pvalue = .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 ttest 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. 