Unit 2: Exploring Two-Variable Data Quiz

What does a scatterplot show?

• Relationship between a quantitative and a categorical variable

• Relationship between two categorical variables

• Relationship between two qualitative variables

• Relationship between two quantitative variables

Tags

CCSS.HSS.ID.B.6

Which variable measures the outcome of a study in a scatterplot?

• Response Variable

• Correlation Coefficient

• Lurking Variable

• Explanatory Variable

What does the correlation coefficient measure?

• Strength of the linear relationship

• Strength of the non-linear relationship

• Strength of the association

• Strength of the causation

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What is a lurking variable?

• A variable that has no impact on the relationship between the variables

• A variable that influences the association between the variables of primary interest

• A variable that is directly related to the response variable

• A variable that is directly related to the explanatory variable

Tags

CCSS.HSS.ID.C.9

When looking at scatterplots, what should we be careful about?

• Be sure the association is non-linear

• Don't say 'correlation' when you mean 'association'

• Don't correlate quantitative variables

• Don't confuse 'correlation' with 'causation'

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.9

What does the correlation coefficient not measure?

• Strength of the causation

• Strength of the relationship

• Strength of the non-linear association

• Strength of the linear association

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.C.9

What does a correlation near zero correspond to?

• Weak association

• Moderate association

• Strong association

• No association

Tags

CCSS.HSS.ID.C.8

What is the ideal way to picture associations between two quantitative variables?

• Bar graphs

• Histograms

• Pie charts

• Scatterplots

Tags

CCSS.HSS.ID.B.6