3rd octoberalg2
- 2. Spread the seats Listen carefully to the instructions 22 min Individual/no discussions Raise your hand quietly for questions and wait for me to come Stay seated until I ask you to give me back the papers
- 3. WALT : Associations between numerical variables Scatterplots WILF : Seatings in semi-circles and focused class work TIB : There are many versions of frequency tables and each version helps us peek at the data from a different perspective. This opens insights.
- 4. Quiz 4 Tuesday 9th October (Lesson 11 to Lesson 15 in statistics package) All my powerpoints are accessible either through classroom or engrade I post all corrections on engrade My next office hours (in ASI) are Thursday 4th of October after school. Target behavior of Month : Staying focused and on task during classtime
- 5. Conditional relative frequencies : divide frequency by marginal frequency Association between variables means there is a correlation,as one increases the other increases/decreases Conditional frequencies cqn be used to assess whether there is an association between variables
- 6. I could see if you didn’t do it, after 3 strikes I inform your parents. Khanacademy skills related to relative frequencies No homework for next session Correction
- 7. Instructions : • Listen carefully to the instructions • Take 25 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
- 12. We analyzed categorical data using frequency tables Concerning numerical variables, we use scatterplots Scatterplot : If two numerical variables are denoted by x and y, then the scatterplot of the data is the plot of the data pairs
- 13. Is there any pattern in this scatterplot ? Yes,we always look for patterns and try to explain them
- 15. Hardcopy is handed out Individual work,voice level 0 I will be going around for help,raise your hand Take 7 minutes to do this
- 18. Is there a relationship between the number of cell phone calls and age, or does it look like the data points are scattered? There is a relationship. If there is a relationship between the number of cell phone calls and age, does the relationship appear to be linear? The pattern is linear—as age increases, the number of cell phone calls decrease.
- 20. Is there a relationship between moisture content and frying time, or do the data points look scattered? There is a relationship If there is a relationship between moisture content and frying time, does the relationship look linear? As the frying time increases, the moisture content decreases. It is not linear. This is called an exponential curve
- 21. Scatter Plot 3 shows data for the prices of bike helmets and the quality ratings of the helmets (based on a scale that estimates helmet quality).
- 22. Is there a relationship between quality rating and price, or are the data points scattered? There is no relationship; the points are scattered. If there is a relationship between quality rating and price for bike helmets, does the relationship appear to be linear? Because there does not appear to be a relationship between quality rating and price, it does not make sense to say the relationship is either linear or not linear.
- 23. What does this tell us about rating and price? There is no relationship between rating and price that we can summarize Is an expensive helmet going to provide the best protection? Based on data, an expensive helmet may not necessarily provide the best protection
- 24. Read example 1 page 83
- 25. Student Warning 1 Warning 2 Demerit
- 26. 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
- 27. 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
- 28. 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.