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': 'The standard detion of means measures? \nSelect and explain. \nA. Non - sampling errors, B. Sampling error, C. random errors, D. Conceptual errors', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: Parks 23rd edition pg 850 The standard detion of means is a measure of sampling error It is given by the formula SD/ROOT OF RANDOM SAMPLE.', 'role': 'assistant'}]