The amount of nicotine absorbed by the human body can be determined by measuring the amount of cotinine (ng/ml) in the blood. Figure 5.9 shows a histogram for the amounts of cotinine measured in 40 adults who do not smoke but are exposed to second-hand smoke. Is this distribution close to normal? Why or why not?

Transcribed Image Text:

Frequency 30 25 20 15 10 5 0 Cotinine from Second-Hand Smoke 240 360 Amount of cotinine 0 120 480 600