9th octoberalg2
- 2. 5 min Individual/voice level 0 Review your notes from last session
- 3. WALT : How good is our model : residuals How to choose best model based on residuals WILF : Focused work and no chattiness TIB : There is a variety of models and only a few are accurate, we need to be able to choose
- 4. Apologies for not posting the Khanacademy skills Quiz 4 Thursday 11th October (Lesson 11 to Lesson 15 in statistics package)
- 5. There are two types of non linear relationships : quadratic and exponential Having equations to represent our models helps to predict
- 6. For linear relationships : we use a line to model the pattern I want you to be able to create the equation for this type of model We will learn how to choose the best line of fit
- 10. What do we mean by line of best fit ? Line that best models a linear relationship (closest to most values) What do we mean by residuals ? Difference in y values between actual and predicted values What are residuals used for ? To determine which line is the best fit How do we use residuals ? The best fit line has the sum of residuals close to 0
- 11. Hardcopy is handed out Individual work,voice level 0 I will be going around for help,raise your hand Take 10 minutes to do this
- 13. The line of best fit to a linear relationship is the one that has the smallest sum of squared residuals min( 𝑟𝑒𝑠𝑖𝑑𝑢𝑎𝑙𝑠 2 )
- 14. Knowing the residuals,we can calculate the error of prediction Small residuals => Good fit => Low error in prediction Big residuals => Bad fit => Big error in prediction
- 17. Answer on the worksheet handed out per group • Listen carefully to the instructions • Take 15 minutes to do the exercises on your own • Stay focused • Voice level 1 discussions (no excessive noise) • Raise your hand quietly for questions and wait for me to come
- 18. Student Warning 1 Warning 2 Demerit
- 19. Do not talk unless you have permission (Raise your hand) No talking back (Come see in end of class) Stay focused and on task Respect your classmates and teacher Be prepared
- 20. You are expected to do your homework on the due date (no excuses) Every time you miss a homework you get a strike,after 3 your parents are informed Not doing your homework will negatively affect your grade in participation and quizzes
- 21. The corrected quiz as well as rubrics will be posted on Engrade. An individual assesment means no discussion at all. Any talking will result in a 0. If you missed a quiz/test, you are responsible to come to office hours to retake it. Come see me right after class or office hours to discuss your copy, do not bring it up inside class. Any copy written in pencil cannot be considered for re- grading, use a pen.