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According to almanac, 60% of adult smokers started smoking before turning 18 years old

(a) Calculate the mean and standard deviation of random variable x, the number of smokers who started before 18 in 400 trials of probability experiment.

(b) Interpret the mean

(c) Would it be unusual to observe 320 smokers who started smoking before turning 18 years old in a random sample off 400 adult smokers? Why?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91124011

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