Question

Match each scatter plot shown below with one of the four specified correlation coefficients. a 0.97 b.-0.23 C.-090 d 0.53 o18 o o O ob o l9 olo o

Answer 1

Since the scatterplot in 1st figure is upward sloping and the points are clustered together around a line, so 1st graph indicates correlation coefficient of 0.97.

Since the scatterplot in 2nd figure is downward sloping and the points are clustered together around a line, so 2nd graph indicates correlation coefficient of -0.90.

Since the scatterplot in 3rd figure is somewhat downward sloping and the points are not really clustered together around a line, so 3rd graph indicates correlation coefficient of -0.23 (which also indicates weak correlation).

Since the scatterplot in 4th figure is somewhat upward sloping and the points are not really clustered together around a line, so 4th graph indicates correlation coefficient of 0.53.