Correlation Quiz

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

Average fat intake per citizen of a country and average cancer rate of a country.  $r=.73$  

• 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

Average time spent listening to music per day and average time spent watching TV per day.  $r=-.17$  

• 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

As x increases, y decreases.

• A) no correlation

• B) negative correlation

• C) correlation coefficient

• D) positive correlation

As x increases, y increases

• A) correlation coefficient

• B) causation

• C) positive correlation

• D) negative correlation