[Solution Library] When nicotine is absorbed by the body, cotinine is produced. A measurement of cotinine in the body is therefore a good indicator of how
Question: 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 number of cigarettes smoked per day and the measured amounts of cotinine (in ng/ml). (The values are from randomly selected subjects in a National Health Examination Survey.)
Is there a significant linear correlation?
How would you measure the cotinine level in the body?
Explain the result.
| x (cigarettes per day) | 60 | 10 | 4 | 15 | 10 | 1 | 20 | 8 | 7 | 10 | 10 | 20 |
| y(cotinine) | 179 | 283 | 75.6 | 174 | 209 | 9.51 | 350 | 1.85 | 43.4 | 25.1 | 408 | 344 |
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