Suppose that the time until failure of a certain device has an exponential distribution. If the mean time until failure of the device is 25.000 hours what is the probability that the device will last at least 30.000 hours?

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Q: Q4:Let X be a continuous random variable with distribution ==kif 0≤x≤8 f(x): elsewhere 1. Find P (2…

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Q: ) If X and Y are two independent random variables, then show that: 4/6 Var (X+Y) = Var (X) + Var (Y)

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Q: O Question 24 O Question 25 O Question 26 O Question 27 O Question 28 O Question 29 O Question 30 O…

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Q: expected return is 13% with a standard deviation of 30%.

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Q: 18. A spinner has ten sectors in different colours. The sectors are different sizes. Here are the…

A: The probability distribution is given as:

Q: 1) Dan bought a box with 120 USB drives for his company. The defect rate for this USB drives brand…

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Q: A sports team has a record of 10 wins, 6 losses, and 1 tie. In how many ways can this record occur?…

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Q: Answer each of the following. In how many ways can 6 persons be seated in a row? In how many ways…

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Q: 1) Dan bought a box with 120 USB drives for his company. The defect rate for this USB drives brand…

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Q: 1) The following spinner was spun 32 times. What is the probability of spinning A seven times?

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Q: For not mutually exclusive events A and B, P(A) = 0.59, P(B)=0.46 and P(A B)=0.28. Find the P(AUB).

A: Given:        The A and B are not mutually exclusive P(A) = 0.59 P(B) = 0.46 P(A ∩ B) = 0.28

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Q: For each problem, select the best response a) Suppose you collect a SRS of size n from a opulation…

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Q: During one year, a particular mutual fund outperformed the S&P 500 index 41 out of 52 weeks. Find…

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