Finals Review - Linear Regression

What kind of correlation?

• Positive
• Negative
• No

What kind of correlation?

• Positive
• Negative
• No

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

Estimate the correlation coefficient for this scatterplot.

• A) r = -0.9

• B) r = 1

• C) r = 0.9

• D) r = -1

Describe the relationship between the variables.

• A) Weak positive correlation

• B) Weak negative correlation

• C) Strong positive correlation

• D) Strong negative correlation

r=-0.89

• Strong positive 
• Weak positive 
• Strong negative 
• Weak negative 

r=0.3

• Strong positive 
• Weak positive
• Strong negative
• Weak negative 

Which value below could be the correlation of the scatterplot?

• -0.923

• -0.478

• 0.006

• 0.777

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

• 
• 
• 
• 

What type of correlation does this graph show?

• Positive correlation

• Negative correlation

• No correlation

• Constant correlation