Cotinine (ngmLD 0-99 100-190 Refer to the tabie to the right summatzing measured amounts of serum cotnine (ngimL) trom a sample of smokers. When nicotine is absorbed by the body, cotnine is produced. Use percentages to construct the relative trequency distribution coesponcing to this frequency distribution. Frequency 14 200-200 400 400

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