According to analmanac, 70% of adult smokers started smoking before turning 18 years old.270 smokers who started smoking before turning 18 years old in a random sample of 300 adult smokers? Why?

(a) Compute the mean and standard deviation of the random variableX, the number of smokers who started before 18 in 300 trials of the probability experiment.

(b) Interpret the mean.

(c) Would it be unusual to observe 270