Correlation Coefficient

Estimate the correlation coefficient.

• r=1

• r=-1

• r=0.5

• r=-0.5

A perfect negative correlation has a correlation coefficient of ____. 

• 1

• -1

• 0

Which graph represents data that has a correlation coefficient close to -1?

• 
• 
• 
• 

What kind of correlation?

• Positive

• Negative

• No

Describe a correlation with a coefficient of r=-0.89

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Describe a correlation with a coefficient of r=0.3

• Strong positive

• Weak positive

• Strong negative

• Weak negative

• strong positive

• strong negative

• weak positive

• weak negative

If r=0 , then there is...

• Negative association

• No correlation

• Positive association

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Describe the relationship between the variables.

• Strong positive correlation

• Weak positive correlation

• Strong negative correlation

• Weak negative correlation