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Suppose that X1, X2, X3, X4 are independent U (0, 1)-distributed random variables and let (X(1), X(2), X(3), X(4)) be the corresponding order statistic. Compute
(a) P (X(2) + X(3) ≤ 1),
(b) P (X(2) ≤ 3X(1)).
a certain adjustment to a machine will change the length of the parts it makes but will not affect the standard
Do these data refute the claim that the mileage per gallon of gas is unaffected by the speed at which the car is being driven?
a final exam in math 160 has a mean of 73 with a standard deviation of 7.8. 40 students are randomly selected and
Why might the assumption of independence be violated? (b) Why might a driver be tempted not to use a seat belt "just on this trip"?
For these data, a 99% confidence interval for true mean weight loss by all patients attending the clinic would have the limits (?, ?).
A doctor suspected that smokers between 40 and 50 with lung disease had been smoking on average more than 20 years - significance level is there sufficient evidence to justify the doctors belief?
Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped.
Does lovastatin reduce the risk of heart attack? Researchers gave lovastatin to 2,325 people and an placebo to 2,081 people. the average age of both groups in 58 years.
company w is testing a sales software. their sales force of 500 people is divided into four regions northeast southeast
Suppose n unrelated people are gathered together. What is the smallest n for which chances are >50% that there will be two or more people born in the same calendar month?
Distances from the past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
scores on a test have a mean of 71 and the score of 80 falls at the 75th percentile. the scores have a distribution
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