Thursday....

Tonight's HW (hopefully you did some last night so you can enjoy Halloween!)

• Pages 214-217 : 7, 9ce, 11, 13, 15a, 
• For #11 you need to answer questions 1, 3, 4 for each scatterplot
• You don't need sentences; you can structure your answer like this for each scatter plot
• Sample answers (how to do 11) based on #12: the stuff in italics is "extra"
• a.) 1.) high leverage and high resid  3.) point removed, r stronger (r increases); 4.) point removed, slope increase (line steeper)
• b.) 1.) high leverage  3.) correlation stronger (becomes +)  4.) slope would increase (steeper)--line would go from horizontal (no association) to a positive slope
• c.) 1.) high residual 3.) correlation would decrease (weaker)  4.) slope would stay about the same (b/c point has no leverage)
• d.) High leverage    3.) correlation would be stronger (decrease because it's negative and r gets closer to -1)  4.)  slope would stay about the same (because the point is close to the LSRL) 
• Want more review for our test?
• Do all of #9!
• Do 15cde

Tomorrow is your last chance to turn in stamps; if you don't have them counted/ready to go tomorrow you will earn a 0! Check yesterday's blog post for instructions.

Your next AP Classroom assignment has been assigned (MC and FR); this is due at midnight Wednesday; it's a great way to study for our test AND your MC score will count as a grade!

• You can just do the Free Response to study on your own--do them on separate paper and use the key below to check your work!

• Unit 2 Progress Check: Free Response KEY! (Click Me)

And here's the plan for the rest of the unit (this week and next week):

• Fri (11/1): Outliers, Leverage, Influential Points + Re-expressing data (ch. 9)
• Mon (11/4): Classwork/Practice (Influential Points and Re-expression) (I'm really hoping we finish our notes tomorrow)
• Tues (11/5): No school (Election Day)
• Weds (11/6): Unit 2 Vocabulary Exam (25 min) + AP MC (Ch. 9, 10)
• Thurs (11/7): Unit 2 AP FR and AP MC Exam
• Fri (11/8): Probability Intro Classwork/Homework! (new unit; ch. 14) 
• *Note: I will be out on this day; you will have a classwork assignment with the sub to start learning some probability stuff!

Tonight = Stamps and Study Vocab (no other hw)

1.) STAMPS ARE DUE! If you didn't have them today be sure you have them ready tomorrow! 

• What do I do?
• Gather all your stamps. You are literally looking for a red stamp, not a paper titled "stamp." 
• Somehow fasten/get all your stamps together
• Clip them all together
• Put them all in an envelope or folder
• Some students cut out the stamps and glue them to a piece of paper or put them in a baggie
• You can do whatever works for you!
• Count all your stamps. Count them again.
• Write the total and your name on the front of your stamp.
• Double check your count.
• I will randomly select 5 names from each class and re-count these peoples' stamps; if your total is incorrect you will be given a 0.
• You must do this outside of class. If you count/gather your stamps in class you will be given a 0. 

2.) VOCAB QUIZ TOMORROW! STUDY! Here's your vocab list....

• Residual
• Formula: How it it calculated?
• Graphical Definition: What does it look like on a scatterplot (how could we draw a residual?)
• What is it? What does a residual measure? (Think about how it's interpreted)
• Overestimate
• Know what it is, how it relates to residuals
• Underestimate 
• Know what it is, how it relates to residuals
• Interpret Slope
• Interpret Y Intercept
• Interpret R^2
• Compare Correlations (like #9 from our ch. 7 vocab quiz)
• Actual Value (y)
• Predicted Value (y-hat)
• What does "best fit" mean? (think "least squares")
• How do we check: "is a linear model appopriate?" (3 things)
• Coefficient of Determination (what is that?)

3.) This textbook HW is due Friday (get a head start so you can enjoy Halloween!)

• Pages 214-  : 7, 9ce, 11, 13, 15a, 
• For #11 you need to answer questions 1, 3, 4 for each scatterplot
• You probably can't do all of 11, but you probably could comment on the effect on correlation...
• You can definitely do 7, 9ce, and probably 13, and 15a
• Want more review for our test?
• Do all of #9!
• Do 15cde

And here's the plan for the rest of the unit (this week and next week):

• Thurs (10/31): Ch. 8 Vocab Quiz + Ch. 9 Notes (Outliers, Leverage, Influential Points)
• Fri (11/1): Outliers, Leverage, Influential Points (ch. 9)
• Mon (11/4): What does re-expressing data mean? (ch. 10)
• Tues (11/5): No school (Election Day)
• Weds (11/6): Unit 2 Vocabulary Exam (25 min) + AP MC (Ch. 9, 10)
• Thurs (11/7): Unit 2 AP FR and AP MC Exam
• Fri (11/8): Probability Intro Classwork/Homework! (new unit; ch. 14) 
• *Note: I will be out on this day; you will have a classwork assignment with the sub to start learning some probability stuff!

Tuesday HW + Stamps!

1.) Tuesday's HW:

1. Please complete the "Reading Computer Outputs (Stamp)" worksheet provided in class or linked below
• AP Stat: Reading Computer Outputs
2. AND complete the following problem on the back of the worksheet...
• (This is #27d on page 191-192)
• A scatterplot was created to see the association between math and verbal (writing and language) SAT Scores.
• Verbal scores are used as the explanatory variable and math scores are used as the response
• The verbal scores averaged 596.3 with a standard deviation of 99.5, and the math scores averaged 612.2 with a standard deviation of 96.1.
• The correlation for these variables was r = 0.685.
• Write the equation of the regression line.
3. ALWAYS CHECK YOUR ANSWERS!
• Reading CPU Outputs KEY
• Answer to #27 (above):
• predicted math score = 217.7 + 0.662(verbal score)

2.) STAMPS ARE DUE TOMORROW! 

• All stamps are due Wednesday! These count as a classwork grade! And it's a pretty big classwork grade (largest of the quarter) since it's for all of our warmups combined!
• What do I do?
• Gather all your stamps. You are literally looking for a red stamp, not a paper titled "stamp." 
• Somehow fasten/get all your stamps together
• Clip them all together
• Put them all in an envelope or folder
• Some students cut out the stamps and glue them to a piece of paper or put them in a baggie
• You can do whatever works for you!
• Count all your stamps. Count them again.
• Write the total and your name on the front of your stamp.
• Double check your count.
• I will randomly select 5 names from each class and re-count these peoples' stamps; if your total is incorrect you will be given a 0.
• You must do this outside of class. If you count/gather your stamps in class you will be given a 0. 

And here's the plan for the rest of the unit (this week and next week):

• Weds (10/30: Ch. 9 Notes (Outliers, Leverage, Influential Points)
• Thurs (10/31): Ch. 8 Vocab Quiz + Ch. 9 Notes (Outliers, Leverage, Influential Points)
• Fri (11/1): Outliers, Leverage, Influential Points (ch. 9)
• Mon (11/4): What does re-expressing data mean? (ch. 10)
• Tues (11/5): No school (Election Day)
• Weds (11/6): Unit 2 Vocabulary Exam (25 min) + AP MC (Ch. 9, 10)
• Thurs (11/7): Unit 2 AP FR and AP MC Exam
• Fri (11/8): Probability Intro Classwork/Homework! (new unit; ch. 14) 
• *Note: I will be out on this day; you will have a classwork assignment with the sub to start learning some probability stuff!

Monday HW!

Monday's HW:

• This is definitely one of the longest homework assignments I've given you this year--hopefully you got a head start this weekend....
• However, this is also a GREAT assignment in the sense that it reviews the majority of things we need to know about linear regression and scatterplots so far!
• Page 194-195: 41, 47
• All parts! It looks short but 41 has a-g and 47 has a-f
• For both of these you need to write the equation of the LSRL from a "computer output..."
• The slope is always the coefficient to the x variable 
• The y intercept is always the "constant"
• So, for example for 41 the slope is the 0.004 and the y-intercept is the 15.3066
• Or for 47 the slope is the -3.23 and the y-intercept is the 1676 (all the other stuff in 47 is irrelevant)
• For 41f when the question asks, "Does this plot show evidence of a violation..." that's just a confusing way of asking is a linear model appropriate? Or is one of those conditions violated?

STAMPS ARE DUE WEDNESDAY!

• All stamps are due Wednesday! These count as a classwork grade! And it's a pretty big classwork grade (largest of the quarter) since it's for all of our warmups combined!
• What do I do?
• Gather all your stamps. You are literally looking for a red stamp, not a paper titled "stamp." 
• Somehow fasten/get all your stamps together
• Clip them all together
• Put them all in an envelope or folder
• Some students cut out the stamps and glue them to a piece of paper or put them in a baggie
• You can do whatever works for you!
• Count all your stamps. Count them again.
• Write the total and your name on the front of your stamp.
• Double check your count.
• I will randomly select 5 names from each class and re-count these peoples' stamps; if your total is incorrect you will be given a 0.
• You must do this outside of class. If you count/gather your stamps in class you will be given a 0. 

And here's the plan for the rest of the unit (this week and next week):

• Mon (10/28): AP FR Group Work (ch. 7/8)
• Tues (10/29): How can we write the equation of the LSRL algebraically? How can we read computer outputs? (finish ch. 8)
• Weds (10/30: Ch. 9 Notes (Outliers, Leverage, Influential Points)
• Thurs (10/31): Ch. 8 Vocab Quiz + Ch. 9 Notes (Outliers, Leverage, Influential Points)
• Fri (11/1): Outliers, Leverage, Influential Points (ch. 9)
• Mon (11/4): What does re-expressing data mean? (ch. 10)
• Tues (11/5): No school (Election Day)
• Weds (11/6): Unit 2 Vocabulary Exam (25 min) + AP MC
• Thurs (11/7): Unit 2 AP FR and AP MC Exam
• Fri (11/8): Probability Intro Classwork! (new unit; ch. 14) 
• *Note: I will be out on this day; you will have a graded classwork with the sub

Weekend HW + Monday HW!

Weekend HW:

• Our weekend HW recaps a bunch of the stuff we've learned--try this without your notes! If you can answer all these without notes then you know (almost) everything you should at this point in the chapter!
• The title of the weekend HWis "Chapter 8 Quiz: The LSRL"--this one isn't a quiz, but it's a sample of what a chapter 8 quiz would look like!
• Ch. 8 "Quiz" HW! (Click Me!)
• Always check your answers!
• If you can do all this without your notes and answer each correctly then you're in awesome shape!
• Ch. 8 "Quiz" KEY (Click Me!)

Monday's HW:

• Feeling ambitious get ahead? Here's Monday's hw....
• Page 194-195: 41, 47
• All parts! It looks short but 41 has a-g and 47 has a-f
• For both of these you need to write the equation of the LSRL from a "computer output..."
• The slope is always the coefficient to the x variable 
• The y intercept is always the "constant"
• So, for example for 41 the slope is the 0.004 and the y-intercept is the 15.3066
• Or for 47 the slope is the -3.23 and the y-intercept is the 1676 (all the other stuff in 47 is irrelevant)

STAMPS ARE DUE WEDNESDAY!

• All stamps are due Wednesday! These count as a classwork grade! And it's a pretty big classwork grade (largest of the quarter) since it's for all of our warmups combined!
• What do I do?
• Gather all your stamps. You are literally looking for a red stamp, not a paper titled "stamp." 
• Somehow fasten/get all your stamps together
• Clip them all together
• Put them all in an envelope or folder
• Some students cut out the stamps and glue them to a piece of paper or put them in a baggie
• You can do whatever works for you!
• Count all your stamps. Count them again.
• Write the total and your name on the front of your stamp.
• Double check your count.
• I will randomly select 5 names from each class and re-count these peoples' stamps; if your total is incorrect you will be given a 0.
• You must do this outside of class. If you count/gather your stamps in class you will be given a 0. 
• Feel free to turn them in on Monday or Tuesday and I can just add any you get those days to your total!

Have a FANTASTIC weekend everyone! Thanks for a bunch of great classes this week--I've really enjoyed working with you all and seeing the progress we're making! Thanks for making my job fun!

See ya'll Monday. 

Thursday HW, Weekend HW, Monday HW....

Great job today thinking critically/conceptually about some deep stuff! Tomorrow we'll look at how to create a residual plot on our calculator, then we'll look at what R^2 means with an AP Stat Guy video.

Here's your homework for the next few days in case you want to get a head start....

Thursday's HW:

• Page 189-191: 3, 15a, 19be
• For 15a use the given scatter plot and residual plot to determine if a linear model is appropriate--there are three things you should check!
• For 19be you need the equation of the line...
• Look back at #15 for the equation...
• The slope is the coefficient to the x variable, or the 0.065052
• The y intercept is the constant or the 0.154030
• DO NOT ROUND THESE NUMBERS. Use the full decimals given to write your equation, then use that equation for 19be

Weekend HW:

• Our weekend HW recaps a bunch of the stuff we've learned--try this without your notes! If you can answer all these without notes then you know (almost) everything you should at this point in the chapter!
• The title of the weekend HWis "Chapter 8 Quiz: The LSRL"--this one isn't a quiz, but it's a sample of what a chapter 8 quiz would look like!
• Ch. 8 Summary HW! (Click Me!)
• I'll post a key tomorrow...

Monday's HW:

• Feeling super crazy and want to realllly get ahead? Here's Monday's hw....we don't know how to do all of it yet, but we can do some.
• Page 194-195: 41, 47
• All parts! It looks short but 41 has a-g and 47 has a-f
• For both of these you need to write the equation of the LSRL from a "computer output..."
• The slope is always the coefficient to the x variable 
• The y intercept is always the "constant"
• So, for example for 41 the slope is the 0.004 and the y-intercept is the 15.3066
• Or for 47 the slope is the -3.23 and the y-intercept is the 1676 (all the other stuff in 47 is irrelevant)

Wednesday HW!

Tonight's HW = Exploring Residual Plots!

Please complete the "Intro to Residual Plots" worksheet provided in class!

• Intro to Residual Plots
• This assignment will help us to explore how to create residual plots and what they tell us!
• What is a residual plot?
• A graph that shows the residuals on our y axis and the x values (or sometimes predicted y values) on our x axis!
• Question 1/2 (there really isn't a question 1, just use the info in 1 to do 2):
• Use the equation given and/or the graph shown to find the residual for each point
• Then, create a residual plot below using these answers to #1:
• Label your x axis of the residual plot with the same x-values from the scatter plot
• Plot points to represent each residual
• Coordinates = (xcoordinate, residual for that point)
• Question 3:
• 3a, 3b--you got this
• 3c--think about what part of the residual plot represents the LSRL and what the residual plot is showing us about the line/points
• The only bad answer here is a blank paper! Think!
• Question 4:
• Now, try to sketch a residual plot without using any numbers based on the scatter plot show...
• Consider your answer to 3c
• Consider how your residual plot in #2 compares to the graph in #1
• Consider what you know about positive and negative residuals--think about how many points should be positive residuals and how many should be negative, as well as if any points should have a residual of 0!