The article Determination of Carboxyhemoglobin Levels and Health Effects on Officers Working at the Istanbul Bosphorus Bridge

The article €œDetermination of Carboxyhemoglobin Levels and Health Effects on Officers Working at the Istanbul Bosphorus Bridge€ (G. Kocasoy and H. Yalin, Journal of Environmental Science and Health, 2004:1129€“1139) presents assessments of health outcomes of people working in an environment with high levels of carbon monoxide (CO). Following are the numbers of workers reporting various symptoms, categorized by work shift. The numbers were read from a graph.

Can you conclude that the proportions of workers with the various symptoms differ among the shifts?

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Shift Morning Evening Night Influenza 16 13 18 Headache 24 33 6. Weakness 11 16 5 Shortness 9. of Breath