Engineering, 15.02.2020 00:57 barbie1salome
Suppose that when a transistor of a certain type is subjected to an accelerated life test, the lifetime X (in weeks) has a gamma distribution with mean 28 weeks and standard deviation 14 weeks. (a) What is the probability that a transistor will last between 14 and 28 weeks? (Round your answer to three decimal places.) (b) What is the probability that a transistor will last at most 28 weeks? (Round your answer to three decimal places.) Is the median of the lifetime distribution less than 28? Why or why not? The median is 28, since P(X ≤ ) = .5. (c) What is the 99th percentile of the lifetime distribution? (Round your answer to the nearest whole number.) (d) Suppose the test will actually be terminated after t weeks. What value of t is such that only 0.5% of all transistors would still be operating at termination? (Round your answer to the nearest whole number.) t = weeks
Answers: 1
Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
Answers: 2
Engineering, 04.07.2019 18:10
Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.
Answers: 1
Engineering, 04.07.2019 18:20
Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives
Answers: 2
Engineering, 04.07.2019 18:20
Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency
Answers: 1
Suppose that when a transistor of a certain type is subjected to an accelerated life test, the lifet...
English, 27.04.2021 17:40
Mathematics, 27.04.2021 17:40
Computers and Technology, 27.04.2021 17:40
Mathematics, 27.04.2021 17:40
Mathematics, 27.04.2021 17:40
Social Studies, 27.04.2021 17:40
Mathematics, 27.04.2021 17:40
Arts, 27.04.2021 17:40
Mathematics, 27.04.2021 17:40
Chemistry, 27.04.2021 17:40
Mathematics, 27.04.2021 17:40