What type of data is typically visualized using a scatter plot?

• Univariate data

• Categorical data

• Bivariate data

• Qualitative data

What is the primary purpose of a regression line in a scatter plot?

• To highlight individual data points.

• To describe the linear relationship between two variables.

• To calculate the mean of the data.

• To identify non-linear patterns.

What does correlation measure between two variables?

• Only the direction of their movement.

• Only the closeness of their movement.

• Both the direction and closeness of their movement.

• The causal relationship between them.

What is the range of values for the squared correlation coefficient (r²)?

• -1 to 1

• 0 to 1

• -1 to 0

• Any real number

What is the primary lesson learned from the "Cool-Cage Act" example regarding correlations?

• Strong correlations always indicate a direct causal link.

• Correlation implies that one variable causes another.

• Correlation does not necessarily imply causation.

• All correlated variables are directly related.