Correlation Quiz

What does Correlation measure?

• The average of two variables

• The difference between two variables

• The strength and direction of the relationship between two variables

• How many times a value is repeated

If r = +1, what does that mean?

• Perfect positive correlation

• Perfect negative correlation

• No correlation

• Outliers detected

If r = -1, what does that mean?

• Strong positive correlation

• Strong negative correlation

• No relationship

• The variables are identical

If r = 0, what does that mean?

• There is no linear relationship

• Strong positive relationship

• Strong negative relationship

• Data is identical

What type of correlation is this: As income increases, spending increases.

• Positive correlation

• Negative correlation

• No correlation

• Outlier correlation

Which of the following is NOT true about correlation?

• Correlation shows the relationship between two variables

• Correlation tells you which variable causes the other

• Correlation has values between -1 and +1

• Correlation can be positive or negative

What kind of graph is used to visualize correlation?

• Box Plot

• Pie Chart

• Scatter Plot

• Bar Chart