21 For Table 9.1, use software to analyze the data on violent crime rate and percent single parent families.

a) Construct a scatter diagram. What does it show"

b) One point is quite far removed from the others. having a much higher value on both variables than the rest of the sample, but it fits in well with the linear trend exhibited by the rest of the points Show that the correlation changes from .839 to .649 when you delete this observation. Why does it drop so dramatically? Concepts and Applications