Tar Amounts in Cigarettes Narrative
Suppose the amount of tar in cigarettes is normally distributed, with mean 3.5 mg and standard deviation 0.5 mg.
-Refer to Tar Amounts in Cigarettes Narrative. What proportion of cigarettes have a tar content exceeding 4.25 mg?

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The Answer of Tar Amounts in Cigarettes Narrative
Suppose the amount of tar in cigarettes is normally distributed, with mean 3.5 mg and standard deviation 0.5 mg.
-Refer to Tar Amounts in Cigarettes Narrative. What proportion of cigarettes have a tar content exceeding 4.25 mg?