This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'Disadvatage to calculate mean- \nSelect and explain. \nA. Difficult to calculate, B. Difficult to understand, C. May be influenced by abnormal high or low values, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref: Parks 23rd edition pg 847 Mean: Advantages: Easy to calculate and understand. Disadvantages: Unduly influenced by abnormal values in the distribution.', 'role': 'assistant'}]