how much nicotine in a cigarette? what is the average nicotine content for brand a cigarettes? what can you conclude about the difference between the two brands of cigarettes? average nicotine content what is the difference between brand a & brand b cigarettes? average nicotine in cigarette what is the average nicotine content in brand a cigarettes what is the difference between brand b and brand a cigarette what is the average mcg nicotine content of cigarettes what is the nicotine content of a cigarette what is the standard deviation of cigarette nicotine what is the difference between brand a and b cigarettes what is the average nicotine content for brand a cigarettes what is the difference between a brand of cigarettes and brand b cigarettes? what is the standard deviation of brand b cigarettes what is the difference between brand b and brand a cigarettes what is the average nicotine content what is the average nicotine content of brand a cigarettes what is the difference between cigarette brands which type of nicotine is found in b cigarettes?