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.
-If the observation at -20 pounds was removed from the data set, the mean would___
A) increase.
B) decrease.
C) remain the same.

Question

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. 
-If the observation at -20 pounds was removed from the data set, the mean would___
A) increase. 
B) decrease. 
C) remain the same.

Quizplus · Accepted Answer

Removing an outlier that is significantly lower than the other data points will increase the mean, as the remaining data points will have a higher average value.

The Following Histogram Shows the Distribution of the Difference Between