Coefficient Correlation

If r=0 , then there is...

• Negative association

• No correlation

• Positive association

The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?

• A) As the number of coffee shops increase, violent crimes appears to increase.

• B) The line of best fit (regression line) shows a positive correlation

• C) The data has a positive correlation coefficient

• D) An increase in coffee shops causes an increase in violent crimes

• strong positive

• strong negative

• weak positive

• weak negative

Describe the correlation in the graph shown.

• No Correlation

• Strong Negative

• Weak Positive

• Weak Negative

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 for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

What type of correlation does this graph have?

• Positive correlation

• Negative correlation

• No correlation

• Constant correlation

Estimate the correlation coefficient.

• r=1

• r=-1

• r=0.5

• r=-0.5

A perfect positive correlation has a correlation coefficient of ____. 

• 1

• -1

• 0