Describing Scatterplots with Correlation

Which is the explanatory variable?

• Size in Carats

• Price

Which is the response variable?

• Hours of Sleep

• Test Score

Describe the correlation.

• strong positive

• weak positive

• no correlation

• weak negative

• strong negative

Describe the correlation.

• strong positive

• weak positive

• no correlation

• weak negative

• strong negative

Describe the correlation.

• strong positive

• weak positive

• no correlation

• weak negative

• strong negative

Which best describes the scatterplot?

• positive linear

• positive nonlinear

• negative linear

• negative nonlinear

Which best describes the scatterplot?

• positive linear

• positive nonlinear

• negative linear

• negative nonlinear

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

• strong positive

• strong negative

• weak positive

• weak negative

Estimate the correlation coefficient (r).

• 1

• 0.85

• 0.15

• -0.85

Estimate the correlation coefficient (r).

• 0.75

• 0

• -0.75

• -0.95