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Question: What caused the crash of TWA Flight 800 in 1996? Physics professors Hailey and Helfand of Columbia University believe there is a reasonable possibility that a meteor hit Flight 800. They reason as follows. On a given day, 3000 meteors of a size large enough to destroy an airplane hit the earth's atmosphere. Approximately 50,000 flights per day, averaging two hours in length, have been flown from 1950 to 1996. This means that at any given point in time, planes in flight cover approximately two-billionths of the world's atmosphere. Determine the probability that at least one plane in the last 47 years has been downed by a meteor.
Show that a suitable power of a Weibull-distributed random variable whose parameter is gamma-distributed is Pareto-distributed. More pre- cisely, show that if X | A = a ∈ W ( 1 , 1 ) with A ∈ Γ(p, θ), a b then Xb has a (translated) Pareto d..
What must be the probability that a randomly chosen young adult has some education beyond high school but does not have a bachelor's degree?
Is there any evidence of a difference in variability of times for men and women who finished this vertical run? Use a = 0.05 and assume normality.
A researcher hypothesizes that parents with school-aged children are more likely to vote in favor of a referendum increasing public school construct a zero order school referendum attitude table by parenting status?
Given that both balls selected are white what is the probability that bowl 3 was selected?
lake wobegon junior college admits students only if they score above 400 on a standardize achievement test. applicants
The standard deviation is $10,000, can the president conclude that there is difference? At a =0.10, is he correct? The hypotheses and the claim.
How large a sample is required if the 97 percent level of confidence is used and the estimate is to be within $2,500? The standard deviation is $16,000.
If two gloves are randomly selected from the box, without replacement (the first glove is not returned to the box after it is selected), what is the probability that both gloves selected will be right-handed?
Six couples, who all happen to be heterosexual, sit down to dinner at a round table. (That is, each couple consists of one woman and one man.)
Find a 95% confidence interval for the true proportion of registered voters in each political party who checked "Yes" on the Presidential Election Campaign Fund question.
If two people are randomly selected, what is the probability both are hopelessly romantic? What is the probability at least one is hopelessly romantic.
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