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Question: Teen smoking. The Centers for Disease Control say that about 30% of high-school students smoke tobacco (down from a high of 38% in 1997). Suppose you randomly select high-school students to survey them on their attitudes toward scenes of smoking in the movies. What's the probability that
a) none of the first 4 students you interview is a smoker?
b) the first smoker is the sixth person you choose?
c) there are no more than 2 smokers among 10 people you choose?
Take any number, square it, and add 6, multiply by the original number. Now add 5 to that. Now divide this by the original number plus 1. Now subtract your original number and you should get 5.
Assume there're three states of the economy: boom, moderate growth, and recession. The annual return on company A stock and company B stock in each state of the economy is given below
Still more lefties. Suppose we choose 12 people instead of the 5 chosen in Exercise. What's the probability that the majority is righthanded?
Create a 90% confidence interval for the mean difference in memory score between students who study to Mozart and those who listen to no music at all. Interpret your interval.
christine wong has asked dave and mike to help her move into a new apartment on sunday morning. she has asked them both
Determine the probability that there are two or fewer warranty claims on this speci?c system for a car selected at random.
If Stephenson wishes to maximize its total market value, would you recommend that it issue debt or equity to finance the land purchase? Explain.
a coin is flipped. if a heads is flipped then the coin is flipped 2 more times and the number of heads flipped is noted
It labels the top 5% (the heaviest 5%) overweight. How heavy does a box have to be for it to be labeled overweight? Round your answer to the nearest hundredth.
Assuming that the sample was not skewed (i.e. it was normally distributed), about how many exam scores would you expect to fall between the range of 75 to 85?
consider the experiments first draw a poisson random variable n with parameter ?. then perform n independent bernoulli
For an arch chosen at random in Arches National Park, use the preceding information to estimate the probability that the height of the arch poening is:
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