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Understanding Correlation: Homework and Activities for Mastery

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Dive into the world of correlation with today’s objectives focused on understanding its significance and how to calculate it. We will explore matching scatterplots to descriptions, find correlations between heights, and discuss key questions about the correlation coefficient. We will also review past homework focusing on associations between various measurements. Be prepared to engage in a fun birthday activity where you'll guess the ages of famous personalities. Finish with assigned problems from the FAMOUS BIRTHDAYS worksheet due on Monday.

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Understanding Correlation: Homework and Activities for Mastery

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  1. Today’s Objectives: Get out your correlation homework! What does correlation tell me? How do I find it?

  2. Warm Up Match each scatterplot to the below that best describes it. a) b) c) d) e) Find the correlation between the heights of men and women.

  3. Questions from Wednesday… Is the correlation in absolute value when its r? What does the rest of the calculator data mean when solving for the correlation coefficient? Is r important in other areas? Is there a practical use for the paper formula? How far do you round the r value?

  4. Homework Check 4.17 Strong association between a women’s height as an 18 year old and her height as a girl Medium association between a dad’s height and the height of his son Weak association between a husband’s height and a wife’s height

  5. Homework Check 4.18

  6. Homework Check Pg. 164 #’s 1-6 (a) moderate, linear, negative (b) weak, linear, positive (c) strong, linear, positive (d) moderate, linear, negative (a) (b) (c) (d)

  7. Homework Check Pg. 164 #’s 1-6 (a) exp: weight, resp: mpg city (b) exp: weight, resp: displacement (c) One does not explain the other* (d) One does not explain the other* The correlation does not change when we change the units of measure (pg. 161)

  8. Homework Check Pg. 164 #’s 1-6 Correlation ignores the distinction between explanatory (x) and response (y) (pg. 161) (a) one does not explain the other* (b) exp: make, resp: weight (c) one does not explain the other*

  9. Birthday Activity Get out something to write with and your calculator. How good are you at guessing people’s ages? How old do you think Kanye West is? How old do you think Scarlett Johansson is? How old do you think Johnny Depp is? 35 27 49

  10. Scatterplot Reminder • StatEdit • L1: Explanatory/independent/x • L2: Response/dependent/y • 2ndStatPlotPlot1 • On1st type • Xlist: L1 • Ylist: L2 • Zoom9:ZoomStat Correlation (r) Reminder • StatCalc4:LinReg

  11. Homework Finish the questions on the FAMOUS BIRTHDAYS worksheet and turn it in. Pg. 165-166 #’s 4.19, 4.20, 4.24, 4.25 Due Monday

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