Correlation Coefficient

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

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

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

Describe the relationship between the variables.

• no correlation

• strong positive correlation

• strong negative correlation

• weak positive correlation

Describe the relationship between the variables.

• Strong positive correlation

• Strong negative correlation

• Weak negative correlation

• Weak positive correlation

Estimate the correlation coefficient

• r=1

• r=-1

• r=0

• r=-0.5

Estimate the correlation coefficient.

• r=-1

• r=1

• r=-0.5

• r=0.5

Describe the relationship between the variables.

• Strong positive correlation

• Weak positive correlation

• Strong negative correlation

• Weak negative correlation

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