Dellana Company tested 50 products for 75 hours each. During this time, it experienced four breakdowns. Compute the number of failures per hour. What is the mean time between failures?   Collier Company tested 200 products for 100 hours each. During this time, it experienced 12 breakdowns. Compute the number of failures per hour. What is the MTBF?   Crager Company tested 100 products for 50 hours each. During the test, three breakdowns occurred. Compute the number of failures per hour and MTBF.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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 Dellana Company tested 50 products for 75 hours each. During this time, it experienced four breakdowns. Compute the number of failures per hour. What is the mean time between failures?

 

Collier Company tested 200 products for 100 hours each. During this time, it experienced 12 breakdowns. Compute the number of failures per hour. What is the MTBF?

 

Crager Company tested 100 products for 50 hours each. During the test, three breakdowns occurred. Compute the number of failures per hour and MTBF.

 

 

 

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