Card 2 / 10: Use the following information for questions 1-3: In a cohort study of breast cancer in older women, there are two groups, those who were exposed to a known carcinogen and those who were not.In the exposed group, the mean systolic blood pressure was 100 mm Hg, with a standard deviation of 8 mm Hg. There were 169 men in the exposed group. What is the standard error of the mean systolic blood pressure?

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