The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An investigator is studying the frequency of polycythemia in a population of a remote, mountainous region. A representative sample of 100 men shows a normal distribution of hemoglobin concentration with a mean concentration of 17 g/dL and a standard error of 0.1 g/dL. Which of the following best represents the probability that a subject will have a hemoglobin concentration greater than 18 g/dL?   (A) 30%   (B) 15%   (C) 95%   (D) 99%
['(B) 15% <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 30% \n (B) 15% \n (C) 95% \n (D) 99% <> possible answers', '  An investigator is studying the frequency of polycythemia in a population of a remote, mountainous region. A representative sample of 100 men shows a normal distribution of hemoglobin concentration with a mean concentration of 17 g/dL and a standard error of 0.1 g/dL. Which of the following best represents the probability that a subject will have a hemoglobin concentration greater than 18 g/dL? <> context@']