Scatterplots, Correlation, Regression, and Residuals

In a scatter plot what does the x axis (horizontal) of the graph represent?

• Response Variable

• Explanatory Variable

• The X Values of the function

Tags

CCSS.HSS.ID.B.6

In a scatter plot what does the y axis (vertical) of the graph represent?

• Response Variable

• Explanatory Variable

• The X Values of the function

Tags

CCSS.HSS.ID.B.6

If we were to say that two variables are correlated what do we mean by that?

• The two variables related to each other in some way

• When one variable increases the other does too

• The response variable directly affects the explanatory variable

• There is no regression line

What does my correlation coefficient represent?

• How much the response variable increases by for every explanatory variable

• The slope of my regression line

• Its a summary of the direction of the correlation and the strength of the correlation.

• If you choose this one its wrong.

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What is the "error" or the how off your predicted value is from your actual value?

• Residual

• Correlation

• Causation

• Error

Would you say there is a correlation between the two variables? If so, is it strong or weak?

• No correlation. Weak.

• No correlation. Strong.

• Yes Correlation. Weak.

• Yes Correlation. Strong.

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

If you were to see the correlation coefficient of r=-0.54 what could you say about its correlation?

• Positive correlation. Moderate correlation

• Positive correlation. Strong correlation

• Negative correlation. Weak correlation

• Negative correlation. Moderate correlation.

What does it mean to have a negative correlation?

• One variable is bad

• You get a negative outcome

• Your response variable decreases as your explanatory variable increases

• Your response variable decreases as your explanatory variable decreases

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

CCSS.HSS.ID.C.9

Based on the residual plot would you say the regression line is a pretty good fit?

• Yes

• No

• Maybe

• Need more info

Tags

CCSS.HSS.ID.B.6

Based on the residual plot would you say the regression line is a pretty good fit?

• Yes

• No

• Maybe

• Need more info