Categorize a Correlation Coefficient

Estimate the correlation coefficient

• r = 1

• r = -1

• r ≈ -0.8

• r ≈ 0.8

• r ≈ -0.5

What kind of correlation?

• Positive

• Negative

• No

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Estimate the correlation coefficient

• r=-1

• r=1

• r=-0.5

• r=0.5

Estimate the correlation coefficient.

• r=0

• r=-1

• r=1

• r=2

Estimate the correlation coefficient.

• r=1

• r=-1

• r=0.5

• r=-0.5

What kind of correlation?

• Positive

• Negative

• No

r=-0.89

• Strong positive 

• Weak positive 

• Strong negative 

• Weak negative