Questions from Total Quality Management


Q: A time-terminated life testing plan is desired that will accept

A time-terminated life testing plan is desired that will accept lots with a mean life of 6000 hours with a probability of 0.99 and will accept lots with a mean life of 2000 hours with a probability of...

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Q: Refer to Exercise 11-27. Find the appropriate plan using

Refer to Exercise 11-27. Find the appropriate plan using Handbook H-108 if failed items are not replaced during the test. Data from Exercise 11-27: A time-terminated life testing plan is desired that...

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Q: In a time-terminated life testing plan, it is desired

In a time-terminated life testing plan, it is desired to reject lots with a mean life of 1500 hours with a probability of 0.95 and reject lots with a mean life of 7500 hours with a probability of 0.10...

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Q: Refer to Exercise 11-29. If failed items are not

Refer to Exercise 11-29. If failed items are not replaced during the test, determine the plan using Handbook H-108. Data from Exercise 11-29: In a time-terminated life testing plan, it is desired to...

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Q: Two groups of samples of patients were randomly selected from a county

Two groups of samples of patients were randomly selected from a county. The first group (Group 1) had no history of a chronic disease while the second group (Group 2) had a positive history. The selec...

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Q: Refer to Exercise 11-31. Test the null hypothesis of

Refer to Exercise 11-31. Test the null hypothesis of equality of the survival functions of the two groups using a level of significance of 0.05. Data from Exercise 11-31: Two groups of samples of pat...

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Q: Refer to Exercise 11-8 concerning the redesigned remote control unit

Refer to Exercise 11-8 concerning the redesigned remote control unit with 25 components in series. If it is desired that the remote unit has a reliability of 0.996 for 3000 hours of operation, what sh...

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Q: A large retail company has to deliver its goods to distributors throughout

A large retail company has to deliver its goods to distributors throughout the country. It has been offered trial-run services by three transportation companies. To test the efficiency of these three...

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Q: A 95% confidence interval for the mean thickness of a part

A 95% confidence interval for the mean thickness of a part in millimetres is (10.2, 12.9). Interpret this interval.

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Q: An airline is interested in selecting a software package for its reservation

An airline is interested in selecting a software package for its reservation system. Even though the company would like to maximize use of its available seats, it prefers to bump as few passengers as...

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