A study was conducted to evaluate the hypothesis that tea consumption and premenstrual syndrome…

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A study was conducted to evaluate the hypothesis that tea consumption and premenstrual syndrome are associated. A group of 188 nursing stu- dents and 64 tea factory workers were given questionnaires. The preva- lence of premenstrual syndrome was 39% among the nursing students and 77% among the tea factory workers. How many people in each group have premenstrual syndrome?

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