cotinine Levels of Smokers. When people smoke, the nicotine they absorb is converted to cotinine, which can be measured. A sample of cotinine levels of 40 smokers is listed below. Find a 95% confidence interval estimate of the mean cotinine level of all smokers.
1 0 131 173 265 210 44 277 32 3 35 112 477 289 227 103 222 149 313 491 130 234 164 198 17 253 87 121 266 290 123 167 250 245 48 86 284 1 208 173