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 Hb level is healthy women has mean 13.5 g/dl and standard detion 1.5 g/dl, what is the Z score for a woman iwht Hb level 15.0 g/dl- \nSelect and explain. \nA. 9, B. 10, C. 2, D. 1', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref:Parks 23rd edition pg 849 Z score = (individual value - mean) / SD =(15-13.5)/1.5= 1', 'role': 'assistant'}]