Answered: Number of failures per unit-hour of…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 15 units were one failure at 12,000 hours, one at 20,000 hours, and one more at 48,000 hours. The remaining units were still running at 60,000 hours.

Determine the following:

Number of failures per unit-hour of operating time = failures per hour (round your response to eight decimal places).

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