The following histogram shows the distribution of the difference between the actual and "ideal" weights for 119 female students. Ideal weights are responses to the question "What is your ideal weight"? The difference = actual - ideal. 40 30 25 20 Percent 15 10 5 0 -30 -20 -10 0 10 20 30 40 50 60 Difference = Actual - Ideal If the observation at - 20 pounds was removed from the data set, the mean would30 25 20 Percent 15 10 5 - 0 -30 -20 -10 0 10 20 30 40 50 60 Difference = Actual - Ideal If the observation at - 20 pounds was removed from the data set, the mean would O increase. O decrease. O remain the same