Correlation Coefficient

Number of steps taken per day and number of kilometers walked per day.  $r=.92$  

• strong positive

• strong negative

• weak positive

• weak negative

Temperature of a rubber band and distance the rubber band can stretch. $r=.84$  

• strong positive

• strong negative

• weak positive

• weak negative

Car weight and distance traveled using a full tank of gas.  $r=-.86$  

• strong positive

• strong negative

• weak positive

• weak negative

Score on science exam and number of words written on the essay question.  $r=.28$  

• strong positive

• strong negative

• weak positive

• weak negative

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 correlation.

• Negative correlation

• No correlation

• Positive correlation

• Constant correlation

Which scatter plot diagram shows the strongest positive correlation?

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