Interpreting Correlation

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

Rank these scatter plots according to the intensity of the correlation represented, from weakest to strongest.

• 1, 2, 3, 4

• 2, 4, 3, 1

• 4, 3, 2, 1

• 1, 3, 4, 2

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

Which correlation coefficient best describes the correlation shown?

• 0

• -0.75

• -0.3

• 0.3

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

What correlation coefficient would be describe the correlation?

• 0

• -0.999

• 0.978

• 0.2

• strong positive

• strong negative

• weak positive

• weak negative

What type of correlation does this graph have?

• Negative

• no association

• positive

Choose two words from those listed below to best describe the correlation between the two variables.

• strong

• weak

• positive

• negative

Answer explanation

This is weak because the points are not very close together. It is negative because the y values decrease as the x values increase.