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How many workers should be measured in each group

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Question: A physician is planning to take systolic blood pressure measurements from a group of office workers and a group of repair personnel working for a telephone company. Past results indicated that c is approximately 15 mmHg. If it is desired to have a 95% confidence interval of length 4 mmHg, how many workers should be measured in each group?

Reference no: EM131716079

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