a) Circle the one outlier on the scatter plot above. Put an x through the one influential observation on the scatter plot above.b) The value of r^2 was calculated to be 0.41. Interpret this value with regards to the story problem situation.

2. Does the age at which a child begins to talk predict a score later in life on a test of mental ability? A study of cognitive development in young children recorded the age in months at which each of 19 children spoke their first word and their Gesell Adaptive Score, the result of an ability test taken much later. The data appear in the scatterplot below. Regression of Gesell Adaptive Score versus age at first word for 19 children. 120 106 Gesell Adaptive Score Age at first word ( in months)