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
[{'content': 'Outliers have the most marked effect on which of the following? \nSelect and explain. \nA. Mean, B. Mode, C. Median, D. Range', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]