ap statistics review week 5 inference proportions · ap statistics review week 5 inference...

AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and Thursdays. The week of April 20 th we will be reviewing Inference Proportions. The session will begin in room 315 with a brief review of the weekly topic. Instruction will be from 3:15 pm to 3:30 pm Once we have reviewed the topic you may begin practicing the questions in your review packet. Answers will be posted in room 315 and 312 all week and will be posted on line after 3:00 pm on Friday the week of review. 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.

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AP Statistics

Review Week 5

Inference Proportions

Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays

and Thursdays.

The week of April 20th we will be reviewing Inference Proportions.

The session will begin in room 315 with a brief review of the weekly topic.

Instruction will be from 3:15 pm to 3:30 pm

Once we have reviewed the topic you may begin practicing the questions in your

review packet.

Answers will be posted in room 315 and 312 all week and will be posted on line

after 3:00 pm on Friday the week of review.

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: Proportions

Brief Review

There are two things you need to be able to do with proportions…

1.) Make a confidence interval … which is a range estimate of the TRUE

proportion from your sample.

2.) Perform a test of significance … which is a decision making process.

Before you can do a test or create a confidence interval you have to check your

CONDITIONS and ASSUMPTIONS…

1.) Random sampling of independent subjects or groups.

2.) NP and NQ have to be greater than or equal to 10.

Type I Error: Rejecting a true Ho….You think the Ho is not true but it is…

Type II Error: Not rejecting a false Ho…You think the Ho is false but it’s not…

Both of these lead to CONSEQUENCES…Usually MONEY spent on a bad

program…or the chance to correct a problem is ignored because you throw away

a good program.

The HO is always =

The HA is <, > or ≠

You need to define P as the TRUE proportion of…CONTEXT.

1 Proportion Z interval …confidence interval for one proportion

2 Proportion Z interval …confidence interval for two proportions.

1 Proportion Z Test …significance test for one proportion

2 Proportion Z Test …significance test for two proportions.

Alpha is the significance level and the probability of a type I error.

Beta is the probability of a type II error.

Page 3: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

2007 Exam

Page 4: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

Page 5: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

2002 Exam

Page 6: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

Page 7: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

1997 Exam

Page 8: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

2013 Question 5

Page 9: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

2012 Question 4

Page 10: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

2012 Question 5

Page 11: AP Statistics Review Week 5 Inference Proportions · AP Statistics Review Week 5 Inference Proportions Advanced Placement AAP Review will be held in room 315 and 312 on Tuesdays and

2010 Question 3

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