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\ne) To find the nicotine content of the new brand of cigarette with 7 milligrams of tar and a residual of -0.5 milligrams, first calculate the predicted nicotine content using the regression equation: Nicotine = 0.154030 + 0.065052 x 7 = 0.649446 The residual is the difference between the observed nicotine content and the predicted nicotine content: Residual = Observed Nicotine - Predicted Nicotine -0.5 = Observed Nicotine - 0.649446 Observed Nicotine = -0.5 + 0.649446 = 0.149446 Therefore, the estimated nicotine content of the new brand of cigarette with 7 milligrams of tar and a residual of -0.5 milligrams is 0.149446 milligrams

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