Dr. sheffield is a clinical psychologist who specializes in treating pathological gambling. pathological gambling is defined as being unable to resist impulses to gamble. bothered by not having a good measure that he can give to clients to determine whether they are suffering from this condition, he creates a new measure of pathological gambling. the measure has 15 questions, and it takes 20 minutes to complete. to test his measure, dr. sheffield gives his measure to a group of people in gamblers anonymous (ga) and another group of people in alcoholics anonymous (aa). he finds that people in the ga group have higher scores on his new measure than people in the aa group. this procedure is known as a

Griffin correctly concludes that the coordinate pair for the russian federation is an influential point, because removing the russian federation from the relationship will significantly change the trend of the regression line. is an influential point, because removing the russian federation from the relationship will not significantly affect the estimated coefficient of determination of the regression line. is not an influential point, because the russian federation does not have the highest cvdir of all 1111 nations in the scatterplot. is an influential point, because removing the russian federation from the relationship will not significantly affect the estimated slope of the regression line. is not an influential point, because the russian federation has a positive residual in the least-squares linear regression.