Correlation Coefficient

The measure of the strength and direction of a linear relationship

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

The data slightly resembles a line but is more spread out

• Strong Correlation

• Weak Correlation

• No Correlation

• Correlation

What type of correlation does this graph have?

• Negative

• No Correlation

• positive

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

Estimate the correlation coefficient

• r= -0.9

• r= 0.9

• r=-0.5

• r=0.5

What is most likely the correlation coefficient for this data set?

• r = -0.20

• r = -0.75

• r = 0.85

• r = 1.00

Determine the correlation coefficient of the given data.

• - .5477

• .1770

• .8956

• - .9463

Which r-value suggests a weak negative correlation?

• r = 0.1847

• r = −0.1847

• r = 0.9816

• r = −0.9816

Match the following correlation coefficients.

• weak positive

• 0.56

• weak negative

• -0.95

• strong positive

• -0.25

• strong negative

• 0.48

Select the correlation coefficients that represent weak relationships.

• -0.96

• -0.18

• 0

• 0.4136