Smoking and Nicotine When nicotine is absorbed by the body, cotinine is produced.

A measurement of cotinine in the body is therefore a good indicator of how much a person smokes. Listed below are the reported numbers of cigarettes smoked per day and the measured amounts of nicotine (in ng mL). (The values are from randomly selected subjects in the National Health Examination Survey.) Is there a significant linear correlation? Explain the result.