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Open access Macedonian journal of medical sciences, 4(4), 636640

Table 2: Cigarette Composition Data Mass Sample Mass Tar (mg) Nicotine (mg) (mg) 1 0.8239 6.0 0.69 4.6 2 0.956 6.6 0.73 6.8 3 0.9734 6.6 0.94 6.8 4 0.9959 9.6 0.99 7.0 5 1.006 10.0 1.19 8.4 6 1.0704 12.3 1.21 12.7 7 1.0775 13.7 1.38 12.8 8 1.1034 16.9 1.5 14.0 9 1.1086 17.5 1.61 18.3 10 1.1091 22.7 1.69 19.1 11 1.1517 24.2 1.77 22.6 12 1.1957 27.9 1.88 24.8 b) Prepare a 95 % confidence interval for the average amount of nicotine in the cigarettes