Tuesday HW

Tonight please complete these two free response problems on the worksheet provided in class (or below):

• 2017 #5
• This hypothesis test is directly based on today's notes! 
• 2010 (Form B) #5
• Questions a, b, and c are like yesterday's in-class examples
• Question d is based on today's notes!

We will look at these answers tomorrow in class, but if you'd like to get some extra credit.....

Extra Credit HW and Stamp Opportunity:

1. Score your 2017 Free Response using the rubric linked below (this will earn you an extra credit hw grade + 2 stamps)
• This is scored in 3 sections:
• Section 1 = Hypotheses, Conditions, and Name Test
• Section 2 = Math = correct chi squared score, correct p value
• Section 3 = Conclusion
• Give yourself a score of E, P, or I for each section AND record some notes about why you earned that score
• If you earned a P or I explain what you would've needed to earn an E
• If you scored an E, list the criteria that you met to earn that E
• Read everything in the "notes" for each section!
• Then, use the scoring breakdown in the rubric to give yourself an overall score of 1-4
• If you only list E's, P's, and I's with no notes you will not earn any extra credit--this has to be done thoroughly/thoughtfully to earn extra credit!
• Click Me! I'm the scoring rubric! Scroll down to #5!

Here are tonight's hw questions if you need them:

HW + Quiz Tomorrow!

If you still need to make up your "Inference for Means" unit test or your "Ch. 23-25" vocab quiz you must do so by the end of the day Wednesday. If not your scores will be entered as 0's.

• You can make up your tests/quizzes during any free period, lunch, or after school on Monday or Weds.

Monday Night HW = Prep For Tuesday's Quiz!

• We wiill start class with a quiz on t-tests and t-intervals for slope tomorrow (Tuesday)
• Here's exactly what's on your quiz tomorrow (so you can come ready to earn an A)!
• Describe an association in a scatterplot (review; remember to describe the shape (roughly linear, curved, etc.), direction (+ or -), strength, reference r (if possible), and use context! (review question; not in hw, but is in the "last hw" referenced over the weekend)
• Find r from a cpu output (in hw)
• Write a regression equation from a computer output 
• Find the margin of error for a t interval for slope (in hw)
• Show the formula and/or calculate a t interval for slope (in hw)
• Conduct a t-test for slope (hypotheses, get t-score/pvalue from cpu output, show df, write conclusion) (in hw)

• Monday night's homework--I'm checking this (after your quiz)!
• First, complete the assignment provided in class or linked below
• More T Test and T Interval for Slope Practice (Click Me!)
• Then, grade your homework using the answer key linked below!
• HW Answer Key (Click me!)

Tomorrow (after our quiz) we'll finish up our first chi-squared test for independence, discussing the math, conditions, and conclusion. We'll continue with these notes throughout the rest of the week, with the goal of finishing all our AP Stat content by Friday!

Weekend = Study and Get Ahead!

Hey everyone! I hope you enjoyed your day off (with no sub)!

If you had planned to make up your test today I apologize for being out--you'll have to make up your unit test Monday or Tuesday. I will be after school Monday, or you can do it during any free period Monday/Tuesday. 

There is no homework that will be checked Monday. However, two future homework assignments are posted below if you'd like to get a head start!

And start opening those Barron's books and working through some practice exams!

On Monday we'll get back to our more "traditional" classroom vibe and start taking notes on our last topic, chi-squared tests! (We'll also have a chi-squared quiz next Friday, so come ready for 5 days of hard work).

Remember, the key to maximizing your potential (and success) on the AP exam is your preparation. And the best way to prepare is practice exams! Get something done this weekend (please)!

Monday Night HW = Prep For Tuesday's Quiz!

• On Monday we'll start some new stuff (Chi-squared), but we will start class with a quiz on t-tests and t-intervals for slope on Tuesday
• Monday night's homework:
• First, complete the assignment listed below (this is practice for our quiz)
• More T Test and T Interval for Slope Practice (Click Me!)
• Then, grade it! 
• HW Answer Key (Click me!)

Last HW of the Year = Double HW Grade!

• This homework assignment will be our last homework grade; I'm not sure when I'll assign it, but it will probably be after this upcoming week. Feel free to get it done now! (It'll most likely be assigned Monday, May 6th and will be due sometime during that week)

• First, complete the "2016 Investigative Task". (= 1 HW Grade)
• 2016 Investigative Task (Click Me!)
• If you work efficiently in class you may have time to start this (in class)!
• Write your answers thoroughly, as you would on the AP exam!
• Remember, some of this stuff will be different/new to you--and some will be based on things we learned in class!
• Time yourself! This should take a maximum of 25 minutes to complete.

• Then, SCORE YOUR FR  (= Another HW Grade). READ THE INSTRUCTIONS BELOW.

• Link to 2016 Scoring Rubric! Click Me! Scroll to Question #6!

• This question is scored in 3 sections:
• Section 1 = parts a and b
• Section 2 = parts c and d
• Section 3 = part e
• HW Scoring Instructions: You must follow these instructions exactly for scoring homework credit:
1. Write down the 5 bullets that describe the criteria for "Essentially Correct" for section 1. This should be written next to parts a, b and titled "Section 1: E."
1. Check the bullets that you did satisfy
2. Circle any bullets that you did not satisfy
3. Determine your score (E, P, I) and write down this score.
4. Be sure to read the "Notes" in the rubric!
2. Write down the 5 bullets that describe the criteria for "Essentially Correct" for section 2. This should be written next to parts c, d and titled "Section 2: E."
1. Check the bullets that you did satisfy
2. Circle any bullets that you did not satisfy
3. Determine your score (E, P, I) and write down this score.
4. Be sure to read the "Notes" in the rubric!
3. Write down the sentence describing what you need to score "Essentially Correct." Then write down the two statements that would lead to "Partially correct." This should be written next to your answer to part e; label which sentence is "E" and which is "P."
1. Determine your score. (E, P, I)
4. Give yourself an overall score of 1-4. Write this next to your name. 

Have an awesome weekend!

Tonight = Use Some Time to Study!

No formal hw tonight, other than grading last night's one prop z homework if you didn't do so in class.

Use some time to start prepping for AP exams--whether Stat, Environmental, Gov't, or whatever, use some of this extra time to crack open those Barron's books and start doing some practice exams!

Tomorrow we'll come back for some more review before we have a 5 day week of "new stuff" next week. See you there!

2 HW's DUE TOMORROW!

f you missed Thursday's vocabulary quiz you will have to make it up tomorrow in class (instead of your stamp). 

• Check the blog post from 4/17 for the vocab list

If you were out and missed Tuesday's test please make it up during lunch, study hall, or after school before the end of this week (please).

• I will be after school (until about 1) tomorrow.
• I will NOT be after school Friday.

Two Homework Assignments Checked Tomorrow:

• Remember, we're getting close to the end of homework in AP Stat so it's essential you get these done to keep a high homework average!

• HW #1 Due Tomorrow:
• Please complete the "Linear Regression Review Questions" (based on our windmill context) provided in class or below.
• All of this, except for the last multiple choice question, is review! Use your notes!

• HW #2 Due Tomorrow:
• Please complete the "Review Stamp" worksheet (about surveying 452 CT residents) provided in class or below
• Be sure to fully complete this problem for full hw credit!

• HW #1 (if you need it):

.

• HW #2 (if you need it):

• We will look at answer keys and grade both assignments tomorrow in class.

We have 15 more Stat classes until our AP exam!

AP Exam Info:

• Thursday, May 16th
• Report to exam room at 11:30
• Eat lunch period E
• Plan to be at the exam until 4:00 pm (you should be out before then, but don't plan any work shifts or anything before 4)

Two's Day HW!

If you missed Thursday's vocabulary quiz you must make it up before the end of the day tomorrow. If you cannot do it during lunch, study hall,  or before/after school you will have to do it at the start of class (instead of our stamp problem).

• Check the blog post from 4/17 for the vocab list

If you were out and missed today's test you must make it up during lunch, study hall, or after school before the end of this week (please).

Tuesday's HW:

• Please complete the "Linear Regression Review Questions" (based on our windmill context) provided in class or below.
• This homework will be checked on Thursday, but you may receive additional homework tomorrow (and have two due Thurs)--so do it tonight!
• All of this, except for the last multiple choice question, is review! Use your notes!

.

Tomorrow in class we'll start with a review stamp (every day stamp = review), then it's back to t-tests and intervals for slope. See you there!

We have 16 more Stat classes until our AP exam!

AP Exam Info:

• Thursday, May 16th
• Report to exam room at 11:30
• Eat lunch period E
• Plan to be at the exam until 4:00 pm (you should be out before then, but don't plan any work shifts or anything before 4)

Monday = STUDY!

Study for your "Inferences for Means" test Tuesday by (first) completing AND GRADING the "All Things T" review packet provided in class (or linked below).

• Here is a link to the review packet in case you lost yours or were out:
• Click Me for the All Things T Review Packet!
• And here is a link to the key so you can grade your review packet!
• Click Me for the Review Packet ANSWER KEY!

Here's a list of what you need to know for tomorrow's test:

• Conducted a (1 Sample) T Test and (1 Sample) T Interval
• Full process
• Interval = Conditions, Math, Interpret Interval
• Test = Hypotheses, Conditions, Math, Interpret
• Conduct a 2 Sample T Test and 2 Sample T Interval (full process)
• Conduct a Paired T Test and a Paired T Interval (full process)
• Remember, you only need to copy the calculator screen to get full credit for any "math" section--you do not need to show an interval formula, a z/t score formula, or sketch a model
• However, there WILL be questions that require you to know these formulas on tomorrow's test, so you can't completely ignore these formulas!
• Define a Type 1 and Type 2 error for any type of hypothesis test context (1 Sample T, 2 Sample T, or Paired T)
• Know how to use a confidence interval to test hypotheses (decide if you would reject or fail to reject a null based on your interval)
• Know when we would (hypothetically) use a z test/interval for means vs. a t test/interval for means
• We use a z test/interval for means if we know the population standard deviation (sigma)
• We use a t test/interval for means if we only have the sample standard deviation, Sx
• Know how to find sample size given a margin of error
• Remember, we use z* for the critical value here, as we can't look up t* without n (and the point of these questions is to find n!)
• Interpret Confidence Level for any type of t interval
• Know how changing confidence level and/or sample size affect margin of error and the width of an interval
• Know how to calculate margin of error given summary statistics
• Know how to find the margin of error and a point estimate (sample statistic) using only/given only the interval
• Know how alpha, beta, power all relate
• Know how to interpret power

Extra Stamp Opportunity:

1. Finalize your ch. 24 notes--be sure you have all of the (correct) work for the 2 sample T interval (question a) and the 2 sample T test (question c) of the coffee shop context.
• Have all of this done in your notes and show me Monday or Tuesday for 2 stamps.

Weekend = STUDY!

This (3 day), rainy weekend your primary job is to STUDY! And get some extra stamps (see below).

1.) Study for your "Inferences for Means" test Tuesday by completing AND GRADING the "All Things T" review packet provided in class (or linked below).

• Here is a link to the review packet in case you lost yours or were out:
• Click Me for the All Things T Review Packet!
• And here is a link to the key so you can grade your review packet!
• Click Me for the Review Packet ANSWER KEY!
• Although this technically should be done by Tuesday (test day), get it done this weekend! That way you can ask questions in class on Monday, or I will be available after school Monday to answer any questions/help you to review for Tuesday's test.

2.) Now is the time to start studying for your AP exams! Crack open those Barron's books and put in some work! If you really want to do your best on our (or any) AP exam it's all about preparation over the next month...studying the night before the test (only) isn't good enough!

Extra Stamp Opportunities:

1. Complete the All Things T Review packet AND grade it for Monday (3 stamps)
2. Finalize your ch. 24 notes--be sure you have all of the (correct) work for the 2 sample T interval (question a) and the 2 sample T test (question c) of the coffee shop context.
• Have all of this done in your notes and show me Monday or Tuesday for 2 stamps.

Today's Class Recap:

• Ch. 23-25 Vocab Quiz (20 questions)
• Checked HW (Ginkgo and MC)
• Back to the coffee shop context...
• Interpret C. Level (b)
• Write hypotheses, calculate p-value (some of c)
• Interpret P Value (d)
• Interpret Power (added this question)
• On Monday we'll answer any lingering questions about all this T stuff, then it's on to our second-to-last chapter of AP Stat!
• And don't forget--test on everything to do with t tests and intervals (one sample, two samples, paired) is Tuesday!

HW and STUDY!

Wednesday's HW #1:

• Please complete AND GRADE the "Inferences for Means" worksheet (below).
• Here is a link to the answer key (so you can grade your work)
• You will not earn full homework credit if you do not grade/correct your homework
• Click Me for the HW Answer Key!

Wednesday HW # 2: STUDY!  (Inference for Means Vocab Quiz tomorrow)

• When do we use a t-distribution v. a z distribution (Normal model)?
• Know the characteristics of the t-distribution....
• Shape
• How does it compare/contrast with a Normal model
• How do degrees of freedom impact the shape
• Confidence Interval
• Hypothesis Test
• P-Value
• Interpret Confidence Level
• Power
• Alpha, Beta
• Statistic v. Parameter
• Standardized Test Statistic
• Critical Value
• Point Estimate
• Margin of Error
• Statistic v. Parameter
• Standard Error
• Null Hypothesis
• Alternative Hypothesis
• Know how to write conclusions for any hypothesis test
• Effect of n on ME, standard deviation, with of interval
• Effect of critical value on ME, standard deviation, width of interval

Today's Class Recap:

• Stamp = can we determine a causal relationship? (2018 part a)
• HW Answers/Questions (5 MC from last night)
• Ch. 24 Wrap Up Notes:
• What stands out from our work yesterday--what details do we need to pay attention to?
• One example for our notes (coffee shop wait times...)
• Created a 2 sample t interval (in our notes) independently
• What does the confidence level mean?
• Tomorrow we'll finish these notes before our test on TUESDAY!

Tuesday HW, Wednesday HW, Quiz Thursday

Remember we have our MANDATORY AP registration meeting after school tomorrow--I'll see you there!

Tuesday's HW:

• Please complete the "Inferences for Differences in Means (Exit Slip)" (worksheet) provided in class or below. 
• *Remember to always choose "No" when asked if you want "pooled" for a 2 sample t test or interval

Wednesday's HW:

• Please complete the "Inferences for Means" worksheet (below).

Thursday = Inference for Means Vocab Quiz!

• When do we use a t-distribution v. a z distribution (Normal model)?
• Know the characteristics of the t-distribution....
• Shape
• How does it compare/contrast with a Normal model
• How do degrees of freedom impact the shape
• Confidence Interval
• Hypothesis Test
• P-Value
• Interpret Confidence Level
• Power
• Alpha, Beta
• Statistic v. Parameter
• Standardized Test Statistic
• Critical Value
• Point Estimate
• Margin of Error
• Statistic v. Parameter
• Standard Error
• Null Hypothesis
• Alternative Hypothesis
• Know how to write conclusions for any hypothesis test
• Effect of n on ME, standard deviation, with of interval
• Effect of critical value on ME, standard deviation, width of interval

Today's Class Recap:

• Stamp = 2 prop z review
• Classwork = AP Free Response (new stuff)
• Completed an AP free resposne in class--our first 2 sample t test or 2 sample t interval!
• Then, scored another group's FR to see how this is scored on the exam
• Used these as our first examples of 2 sample t stufff!
• Tomorrow/Thurs. we'll get to some "formal notes" about all this

Monday = Study

21 more classes until the AP Exam!!!!

Let's ease back into the grind with no "official" homework. However, I would love it if .....

Tonight take some time to study by... 

• Completing the investigative task we started today, then looking at the online scoring rubric
• 2018 Scoring Rubrics (Scroll Down to #6)
• Working on a practice test in your Barron's book
• Looking at some practice on Khan Academy
• (I vote Barron's book)

Tomorrow in class we'll start our final chapter of "t stuff," and complete two free response items in groups. Then we'll get back to having regular homework and some notes and all that stuff after a little bit of a weird/different kind of day today. See you there!

Happy April Break!

To each you of: Thank you for your hard work thus far. I know that throughout the year I have often been tough on you (lots of lectures about doing better)--know that I am only that tough because I am trying to continually push you to do your best. Then, when your reach that level of expectation, I want to raise the bar even higher...and higher...and higher. That's the only way we can get better in life; we cannot be satisfied with reaching any particular "bar" we set--once we reach that bar, we simply have to move it higher and keep growing, keep improving.

I am very proud of this group of students for all of your work thus far. Thank you for coming to class each day, working hard, bringing positive energy, and listening to me continually harass you to do your work. Thank you for making me look forward to school each day; I absolutely enjoy the opportunity to work with you all, even though sometimes I may be a jerk. I love that I've learned new things about Stats and life from you, and I love talking to you all about college, life, etc. outside of class. Back to Stats--I'm excited for our potential success on the AP exam, and I'm excited to come back for the home stretch and put in some serious work. Let's all get 3's or above on this exam!

Until then, have an AMAZING break. Enjoy some time relaxing, do some fun stuff, spend some time with friends and family, and recharge those batteries for the final 5-week push to the AP exam. See you there! Oh, and do that take home test too. It's kinda a big deal.


Break HW = Start getting ready for May 16th = TAKE HOME TEST!

• If you lost your copies here are the two sections:
• April Break Test: Free Response Section! Click Me!
• April Break Test: Multiple Choice Section (Click Me!)
• Do your best!
• Here's how I suggest doing the take home:
• First, do as much as you can from memory--do the stuff that you KNOW for sure how to do, and circle any questions you are unsure about
• Then, go back with your notes and use your notes to figure out/reserach all the questions you weren't sure about!
• THAT is studying
• If you just do the take home from memory...that's not a particularly effective way to study
• Remember you also have your Barron's book--if you are struggling with a particular topic, look at the table of contents in your Barron's book and find that topic!

Thurs HW!

There will NOT be a vocab quiz tomorrow; we'll save vocab for another test after break! 

Tonight please complete the "Identifying Inference Procedures" questions provided in class or below.

• First, complete the bank at the top with all of the possible tests and intervals we may use:
• 
  

• Next, read each (of the 7 contexts); for each, name the (correct) type of test or interval that we would apply to that context.

• You don't have to actually conduct the tests or create the intervals; the focus of this assignment is to start practicing how we decide what to use for each context! 
• 
  
• 

Today's Class Recap:

• Another Ch. 23 Quiz! (2 AP MC)
• HW Q's
• Completed an "error analysis" for the "remembering words" context from our hw, answered any other hw questions
• Paired T Interval:
• Completed question #2 on our "job satisfaction" slide
• Create Paired T Interval with calc.
• Show correct formula for interval
• Interpret the interval
• How does the interval support our conclusion from last night's hypothesis test (for this context)
• Notes: Mean Difference v. Difference in Means

Tomorrow in class we'll end the week with some classwork before break--see you there!

Wednesday HW

Tonight please finish the "job satisfaction" hypothesis test we started in class (#1 on our slides or below), AND conduct the paired t-test for the "memory recall" context on the back of this paper (hypotheses, conditions, math, conclusion).

Check your answers to the job satisfaction rating hypothesis test!

Today's Class Recap:

• Ch. 23 Quiz (AP MC)
• Conducting a Paired T-Test (New Stuff)
• Started our "job satisfaction rating' context example (slides provided in class)
• Which 2 sample conditions fails?
• How do we conduct any paired t test?
• The math is familiar; the hardest part is recognizing when to use a paired t approach
• How will the conditions be written?
• What notation is used to write our hypotheses?
• Back to math, conclusion (HW)

Tuesday = STUDY! (And do some extra credit?)

Tomorrow we will start class with a chapter 23 quiz. It will be around 15-20 minutes to start class. So tonight, study!

Here's what you should know (really just everything about t-tests and intervals):

• How to conduct a full t-test or t-interval
• Test: Hypotheses, Conditions, Math, Conclusion
• Interval: Conditions, Math, Interpret Interval
• Be sure you know how to show the t-interval formula, including being able to find t* from the t-table based on degrees of freedom (df = n -1) 
• Know how to calculate margin of error given sample data (including finding t* from the t-table)
• Know when we would use a z-test for means v. a t-test for means 
• Z Test for Means: if we know the population standard deviation (sigma)
• T Test for Means: if we do not now the population standard deviation (we only know the sample standard deviation, Sx)
• Know the characteristics of the t-distribution
• Shape
• How does df (and thus, sample size) affect the shape of a t-distribution?
• Which has more variance/variability--Normal model or t?
• Find sample size for a given margin of error
• Remember to use z* with these types of problems--we can't find t* without n, and the point of this question is to find n
• Like 2008B part a (Thurs. HW) OR like the "download times" slide in our notes
• Know how to find margin of error and a point estimate (sample statistic) given only a confidence interval

Want to study and get some extra credit? Check out (and do) these problems in the textbook:

Pages 542-546: 9b, 11, 13acd, 21bc, 31 (full test) 

Today's Class Recap:

• Stamp = Probability Review!
• HW Q's? 
• April Break: TAKE HOME TEST = AP EXAM PREP!
• Passed out test (MC and FR)
• Sign up sheet for April break review session went around
• Discussed importance of AP exam prep
• New stuff = ch. 25
• What does "statistically significant" mean?
• What is "paired data?"
• What are some examples of when/where we would pair data?
• How is a paired t test/interval different from a 2 sample t-test/interval?
• Tomorrow we'll start to do the math and actually conduct a paired t-test and create a paired t-interval

Friday = Ch. 23 and 25 Vocab Quiz! Start studying!

• Statistically Significant
• Paired Data/Matched Pairs
• Mean Difference v. Difference in Means
• T Distribution
• Shape
• How does df affect shape
• Degrees of Freedom (how are they calculated)?
• All vocabulary terms from our test last week are free game--study those definitions!
• Confidence Interval
• Hypothesis Test
• Critical Value
• Standard Error
• Margin of Error
• Point Estimate
• Ho
• Ha
• Confidence Level
• (Standardized) Test Statistic
• P Value
• Alpha Level
• Beta
• Type 1 Error
• Type 2 Error
• Power
• Sampling Variability
• One v. Two Tailed Test
• Reject Null = there IS evidence of Ha
• Fail to Reject = there IS NOT evidence of Ha

Monday HW, Quiz Weds.

Tonight please complete AND GRADE the "Inferences for Means: T Tests and Intervals (More Practice)" worksheet provided in class (or below).

• This provides one more opportunity to practice--we will start class with a chapter 23 quiz on Wednesday!
• We will also start with a ch. 23 and 25 vocab quiz on Friday!
• The key (to grade your work) is at the bottom of this post.

Today's Class Recap:

• Stamp = Find p-values given a standardized test statistic
• HW Q's? Mistake in key...parameter = 4.09al)?
• Critical Thinking Questions (Slide) in our notes....
• How do we find a p-value given only the standardized test statistic and info about the Ha? 
• How do critical values compare for t v. Normal model for a given level of confidence?
• How do we check our conditions if a sample is not "large enough?"
• Sketch a distribution (histogram, stemplot, dotplot), must be unimodal and roughly symmetric
• Looked at context from last two slides
• Tuesday: ch. 25 notes (paired t tests)
• Weds: ch. 23 quiz, more ch. 25 notes
• Thurs: more ch. 25
• Fri: ch. 23/25 vocab quiz, finish ch. 25
• April Break: TAKE HOME TEST = AP EXAM PREP!

Here's the key so you can grade tonight's hw: