In an experiment, two groups are given a list of words. Group A is told to study the words and prepare for a memory test. Group B is only asked to indicate whether each word is "pleasant" or "unpleasant." (Both groups are then given the same memory test.) Group A is engaging in and Group B is engaging in .

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.