Homework Help: statistics

Posted by jerry on Monday, February 7, 2011 at 3:05pm.

According to the Smart magazine, 70% of smokers started smoking before the age of 18. Suppose 10 smokers are randomly selected and the number of smokers who started to smoke before the age of 18 is recorded.

a) explain why this is binomial experiment.

b) find the probability that exactly 7 of them started smoking before the age of 18.

c) find the probability that at least 7 of them started smoking before the age of 18.

d) find the probability that fewer than 4 of them started smoking before the age of 18.

e) find the probability that between 8 and 10 (inclusive) of them started smoking before the age of 18.

No one has answered this question yet.

Answer this Question

Related Questions

statistics - First graders who misbehave in school may be more likely to be ...
mATH - First graders who misbehave in school may be more likely to be regular ...
math - Suppose 80% of citizens in Singapore are smokers. During a year, 50% of ...
statistics - from generation to generation, the average age when smokers first ...
statistics - First graders who misbehave in school may be more likely to be ...
statistics - Construct a frequency distribution of the ages that 25 randomly ...
Statistics - The author’s of the article “Perceived risks of Heart ...
Stats - In one study of smokers who tried to quit smoking with nicotine patch ...
Statistics - In one study of smokers who tried to quit smoking with nicotine ...
Sociology Follow Up - Here are some of the rationalizations I came up for ...

For Further Reading

First Name:
School Subject:
Answer: