According to an​ almanac,60​%of adult smokers started smoking before turning 18 years old.   ​(a) Compute the mean and standard deviation of the random variable​ X, the number of smokers who started before 18 in 200 trials of the probability experiment. ​(b) Interpret the mean. ​(c) Would it be unusual to observe 180 smokers who started smoking before turning 18 years old in a random sample of 200 adult​ smokers? Why?

Q: According to an almanac, 60% of adult smokers started smoking before turning 18 years old. (a)…

A: Given information- Sample size, n = 300 The proportion is = 0.60 So, p = 0.60, q = 1 - p = 0.40

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