AP Statistics

Review Week 6

Inference for Means

Review the topic and then attempt the problems. Check the teacher page for

solutions. If you have difficulty with a question look at the detailed answer

postings BEFORE you ask your teacher for help.

Get a hint….DON’T COPY THE ANSWER!!! THAT IS NOT HELPFUL!!

When you have completed a question…REFLECT!!!! Ask yourself what skill you

used to solve that problem and write that down!!

Once we have completed the weekly review, keep it to study from as we get

closer to the exam.

Inference for Means

Brief Review

There are 3 TESTS and 3 Confidence Intervals that we can do for Means.

1 Sample t-test/interval for one mean:

1.) Must have randomization in your sampling technique

2.) 𝒏 ≥ 𝟑𝟎

3.) If your sample is small…check the normality condition…sketch a graph

and COMMENT…

DON’T forget the degrees of freedom…

2 Sample t-test/interval for two means:

Everything is the same except you have two samples instead of one.

Paired difference test/interval:

𝑯𝒐: 𝝁𝒅 = 𝟎

Reject the Ho if zero is NOT in your confidence interval.

2007 Exam

2002 Exam

1997 Exam

2014 Exam #5 Paired Difference Test

2013 Exam # 1 Confidence Interval for 1 Mean

2011 Exam #4 2 Sample t-test for Means

2010 Exam #5 2 Sample t-test for Means