Suppose the amount of tar in cigarettes is normally distributed with mean 3.5 mg and standard deviation 0.5 mg.
What proportion of cigarettes have a tar content exceeding 4.25 mg?
______________
"Low tar" cigarettes must have tar content below the 25th percentile of the tar content distribution. What is the value, which is the 25th percentile of the tar content distribution?
______________

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The Answer of Suppose the amount of tar in cigarettes is normally distributed with mean 3.5 mg and standard deviation 0.5 mg.
What proportion of cigarettes have a tar content exceeding 4.25 mg?
______________
"Low tar" cigarettes must have tar content below the 25th percentile of the tar content distribution. What is the value, which is the 25th percentile of the tar content distribution?
______________

Suppose the Amount of Tar in Cigarettes Is Normally Distributed