A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours. The remaining units were still running at 60,000 hours. Determine the following: a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place). b) Number of failures per unit-hour of operating time = failures per hour (round your response to eight decimal places).

A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours. The remaining units were still running at 60,000 hours. Determine the following: a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place). b) Number of failures per unit-hour of operating time = failures per hour (round your response to eight decimal places).

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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