Carboxyhemoglobin is formed when hemoglobin is exposed to carbon monoxide. Heavy smokers tend to have a high percentage of carboxyhemoglobin in their blood. A random sample of 12 blood tests given to a heavy smoker gave the following results for the amount of carboxyhemoglobin in his blood. Construct a 99% confidence interval for the average amount of carboxyhemoglobin in this patient’s blood. Write a sentence that interprets this interval. 9.1 9.5 10.2 9.8 11.3 12.2 11.6 10.3 8.9 9.7 13.4 9.9

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