A zoologist collected 20 wild lizards in the southwestern United States. After measuring their total length (mm), they were placed on a treadmill and their speed (m /sec) recorded.

Speed 1.28 1.36 1.24 2.47 1.94 2.52 2.67 Length 179 157 169 146 143 131 159 Speed 1.29 1.56 2.66 2.17 1.57 2.10 2.54 Length 142 141 130 142 116 130 140 Speed 1.63 2.11 2.57 1.72 0.76 1.02 Length 138 137 134 114 90 114

(a) Create a scatter plot. Comment on any unusual observations.

(b) Calculate the sample correlation coefficient.