system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Outliers have the most marked effect on which of the following?
assistant
The correct answer is  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