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Step 1 Mean of tar levels (x) = (24 + 14 + 0.5 + 0.8 + 0.8 + 1.5 + 1.2) / 7 = 42.8 / 7 = 6.114 Mean of nicotine levels () = (0.5 + 0.8 + 0.8 + 1.5 + 1.2) / 7 = 4.8 / 7 = 0.686 Show more Show all steps Avi Zellman and 63 other Intro Stats / AP Statistics educators are ready to help you

By the numbers: The iSelect study found the average smoker in Illinois spends about $3,282 a year on cigarettes, with an average pack price of $11.99

The growing problem can be explained in three simple truths: 1) E-cigs and vapes are full of superheated toxic substances When someone takes a puff on an e-cig or vape pen, the liquid nicotine solution inside is rapidly superheated into the vapor they inhale

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The sample injection volume was 20 L