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
Disadvatage to calculate mean- 
Select and explain. 
A. Difficult to calculate, B. Difficult to understand, C. May be influenced by abnormal high or low values, D. None
C: May be influenced by abnormal high or low values
Answer: C: May be influenced by abnormal high or low values 
Explanation: Ref: Parks 23rd edition pg 847 Mean: Advantages: Easy to calculate and understand. Disadvantages: Unduly influenced by abnormal values in the distribution.