In the middle, we see the correlation computed when we include the outlier, along with a straight line representing the relation; here, it is a positive relation. In general, there are three effects t...In the middle, we see the correlation computed when we include the outlier, along with a straight line representing the relation; here, it is a positive relation. In general, there are three effects that an outlier can have on a correlation: it can change the magnitude (make it stronger or weaker), it can change the significance (make a non-significant correlation significant or vice versa), and/or it can change the direction (make a positive relation negative or vice versa).
In general, there are three effects that an outlier can have on a correlation: it can change the magnitude (make it stronger or weaker), it can change the significance (make a non-significant correlat...In general, there are three effects that an outlier can have on a correlation: it can change the magnitude (make it stronger or weaker), it can change the significance (make a non-significant correlation significant or vice versa), and/or it can change the direction (make a positive relation negative or vice versa).
