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Dmitry [639]
2 years ago
15

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

Mathematics
1 answer:
dangina [55]2 years ago
4 0
A) mean = np
0.6(200) = 120
SD^2= np(1-p)
SD = sqrt(200(0.6)(1-0.6))
SD = 6.928
B) the mean of binomial distribution in this case is the average number of samples you’ll have to take before you achieve a sample of 200 where 60% of smokers who started smoking before 18.
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