You're the operations manager at an urban hospital and you're evaluating a proposal from a hospital equipment company that manufactures oxygen delivery systems. The company is developing a new manifold that they promise will operate for two years before any possibility of a breakdown. As delivering oxygen 24/7 is a requirement, you've asked the company for the testing data on these manifolds. As they want your business they provided the following data on 10 manifolds that went through accelerated testing. The results are below.
One unit failed at 356 operating hours.
One unit failed at 354 operating hours.
One unit failed at 3466 operating hours.
One unit failed at 5260 operating hours.
Five units successfully completed 20,000 operating hours.
A. Determined the failure rate of this manifold.
B. Determine the mean time failure of this manifold.
C. Are the company's claims about the manifold operating for two years correct based on the results above?