3. A machine has n components, the lifetimes of which are independent. However the whole machine will fail if any component fails. The hazard functions for the components are h1(t),..., hn(t). Show that the hazard function for the machine is h(t).
3. A machine has n components, the lifetimes of which are independent. However the whole machine will fail if any component fails. The hazard functions for the components are h1(t),..., hn(t). Show that the hazard function for the machine is h(t).
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:3. A machine has n components, the lifetimes of which are independent. However the whole
machine will fail if any component fails. The hazard functions for the components are
n
h1(t),..., hn(t). Show that the hazard function for the machine is
h:(t).
4. Suppose that the lifetime distributions of the components in Exercise 3 are Weibull distributions
with scale parameters p1,..., Pn and a common index (i.e. "shape parameter") y so that the
hazard function for component i is yp:(pit)"-1. Find the lifetime distribution for the machine.
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