Wednesday!

Today's Class Recap:

• Stamp = classwork grade = working with residuals
• Back to chapter 8 notes...
• Watched the AP Stat Guy video about the meaning of R^2 and discussed
• Created a writing template for how to interpret R^2
• Absent? Check out the AP Stats Guy video on R^2! (Click me, I'm a link!)
• Review: Check out the "AP Stat Guy" videos for help interpreting slope and y intercept!
• AP Stats Guy: Interpreting Slope and Y Intercept (Click me!)
• AP Stats Guy: Residuals (Click me!)
• Want more? Use the AP Stats Guy link on the right and check out his Unit 2 videos!
• Or, use the Crash Course, Yay Math, or Khan links to review!
  

Wednesday HW: 

1.) Please THOROUGHLY complete the "Pop Quiz: Interpreting Bivariate Statistics" worksheet provided in class (or below).

• For #1 please create a scatterplot, sketch it, and make sure that it is roughly linear, and comment on whether or not we have two quantitative variables
• Don't worry about the residual plot stuff--we'll learn that on Friday
• For #'s 2a-d, be thorough! Write these as you would on a quiz!
• We will have a quiz to start class on Tuesday that will be very similar to this; the only difference is that on Tuesday you will have to read a computer output to get these statistics (slope, y-intercept, R^2, r) rather than generating them with your calculator
• See the answer key at the bottom of this post to check your responses.

2.) Please complete the 3 multiple choice questions below. 

• SHOW ALL WORK FOR THE LAST QUESTION (#8)

3.) Bonus Stamp Opportunity (up to 3 stamps): look up what we mean by "best fit!" Then, try to re-write this in your own words, in your notes! I'll come look tomorrow when I check homework!

• Your definition cannot state "the line that best fits the data"--that's the question, what does BEST mean?
• Hint: your answer should have something to do with residuals/errors (remember, error and residual are the same thing)....
• If you copy the definition and do not paraphrase/put it in your own words = 1 stamp
• Copy the definition AND translate this definition into your "own words" = 3 stamps
• Label your definitions:
• DEFINITION: 
• OWN WORDS: 

Friday in class we'll discuss what "best fit" means and start to work with residual plots! We'll finish up our notes next week and do some classwork/practice, with the goal of finishing this section by Wednesday!

Oh, and if you're looking to get  head start--this will be our weekend HW.

• 15 (is a linear model appropriate and interpret R^2)
• 19 (write equation, predict, interpret slope, interpret intercept, use residual)
• 35bcdefg (interpret R^2, find LSRL equation, is a linear model appropriate and create residual plot, interpret slope and y intercept, use residual)

"Interpret Pop Quiz" Answer Key: