U4D10 Warm up: A movie theater has 20 seats in row 1, 25 seats in row 2, 30 seats in row 3, and so on. How many seats are in row 12? 75 seats

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U4D10 Performance Task and Correlation vs Causation OBJ: S-ID U4D10 Performance Task and Correlation vs Causation OBJ: S-ID.8 Compute (using technology) and interpret the correlation coefficient of a linear fit. AND S-ID 9 Distinguish between correlation and causation.

Freakonomics http://www.youtube.com/watch?v=t8ADnyw5ou8 http://www.youtube.com/watch?v=lbODqslc4Tg

When a cause-and-effect relationship exists between two variables we describe this relationship as causal. The independent variable, referred to as the explanatory variable, causes an increase or decrease in the dependent, or response, variable. A correlation is simply a measure of the relationship between two variables. It does not imply that one variable causes a change in the other.

Sometimes it may look like there is a causal relationship between two variables, but when the relationship is studied further, a lurking variable is effecting both variables. An example of this is the assumption that consuming ice cream was causing polio. In fact, it was not causing polio, but the warm weather caused spikes in ice cream consumption and polio. The warm weather was the lurking variable.

For each of the "headlines“, determine whether the language is causal or non-causal. Remember that causal language should indicate one variable is affecting the other and indicate the direction of that causality, while non-causal, correlational language notes and describes a relationship, without suggesting that one variable affects the other.

Which one is more causal? Violent lyrics prompt teens to commit crimes Listening to violent lyrics associated with teen crime Ans: Violent lyrics prompt teens to commit crimes

Which one is more causal? Memory retention enhanced by sleep People who sleep more, remember more! Ans: People who sleep more, remember more!

Which one is more causal? Kids who take music lessons have bigger brains Music lessons improve kids' brain development Ans: Music lessons improve kids' brain development

Next are individual headlines for different studies Next are individual headlines for different studies. Determine whether each is referring to a situation that implies causation or correlation.

Daytime TV tied to poorer mental scores in elderly Correlation

Church attendance boosts immunity Causation

Eating breakfast increases the speed of your metabolism Causation

Disciplinarian parents have obese kids. Correlation

Low self-esteem shrinks brain Causation

Child anxiety linked to drug use Correlation

Early language skills reduce preschool tantrums Causation

Eating dark chocolate linked to weight loss Correlation

Assignment: CW: U4D10 Correlation vs Causation WS HW: U4D7 Homework WS