This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Outliers have the most marked effect on which of the following? 
Select and explain. 
A. Mean, B. Mode, C. Median, D. Range
A: Mean
Answer: A: Mean 
Explanation: The mean is vitiated due to presence of outliers. Outliers are unusually high or unusually low values that do not go with other values. Ref: Medical biostatistics, 1st edition pg: 115