Correlation Coefficient

The correlation coefficient is a number "r" such that: 

• -1<r<1

• -1>r>1

• -1≤r≤1

• -1≥r≤1

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• -0.19 weak

• -0.19 moderate

• 0.04 weak

• 0.04 strong

Estimate the correlation coefficient

• r=-1

• r=1

• r=-0.5

• r=0.5

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

Determine the correlation coefficient of the given data.

• - .5477

• .1770

• .8956

• - .9463

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

• r = -0.20

• r = -0.75

• r = 0.85

• r = 1.00

Estimate the correlation coefficient

• r = -0.9

• r = 0.9

• r = -0.5

• r = 0.5

As shown in the table, a person's target heart rate during exercise changes as the person gets older. Find the correlation coefficient (r).

• -0.999

• -0.664

• 0.998

• 1.503

Match the following correlation coefficients.

• strong positive

• -0.25

• weak negative

• 0.48

• weak positive

• 0.56

• strong negative

• -0.95

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1