Question: 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

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 13 173 265 210 44 277 32 3 35 477 289 227 103 222 149 313 491 130 234 164 198 17 253 87 2 266 290 123 167 250 245 48 86 284 208 17:3 86266 231

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