Mathematics
Mathematics, 14.10.2021 02:30, DeanWhinchester8970

According to an almanac, 100% of adult smokers started smoking before turning 18 years old. (a) If 100 adult smokers are randomly selected, how many would we expect to have started smoking before turning 18 years old?
(b) Would it be unusual to observe 90 smokers who started smoking before turning 18 years old in a random sample of 100 adult smokers? Why?

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