Questions from Total Quality Management

Q: Refer to Exercise 11-17. Assume that each failed item

Refer to Exercise 11-17. Assume that each failed item is replaced with an identical unit. Estimate the mean time to failure and the failure rate. Find a 90% confidence interval for the mean time to fa...

Q: A sample of 25 relays is chosen for life testing. The

A sample of 25 relays is chosen for life testing. The time to failure of a relay is exponentially distributed. The test is terminated after 800 hours, with five failures being observed at times 610, 6...

Q: A life testing plan isto be terminated after the eighth failure.

A life testing plan isto be terminated after the eighth failure. It should reject a lot that has an acceptable mean life of 900 hours with a probability of 0.10. Items that fail during the test are no...

Q: Refer to Exercise 11-20. Assume that failed items are

Refer to Exercise 11-20. Assume that failed items are immediately replaced during the test. Using Handbook H-108, what is your recommendation on the lot? Data from Exercise 11-20: A life testing plan...

Q: A life testing plan is to be terminated after the third failure

A life testing plan is to be terminated after the third failure. It should accept a lot that has an acceptable mean life of 600 hours with a probability of 0.99. Failed items are not replaced during t...

Q: A time-terminated life testing plan is to be found that

A time-terminated life testing plan is to be found that will reject lots with a mean life of 1500 hours with a probability 0.05 and accept lots with a mean life of 600 hours with a probability of 0.10...

Q: Refer to Exercise 11-23. Suppose that items that fail

Refer to Exercise 11-23. Suppose that items that fail during the test are immediately replaced with similar items. Determine the life testing plan using Handbook H-108. Data from Exercise 11-23: A ti...

Q: Distinguish between a hypergeometric and a binomial random variable.

Distinguish between a hypergeometric and a binomial random variable.

Q: A time-terminated life testing plan is to be found that

A time-terminated life testing plan is to be found that will reject lots that have a mean life of 1400 hours with a probability of 0.05. The rejection number is 7, with a sample size of 35. Determine...

Q: Refer to Exercise 11-25. If failed items are replaced

Refer to Exercise 11-25. If failed items are replaced with similar items, determine a life testing plan using Handbook H-108. Data from Exercise 11-25: A time-terminated life testing plan is to be fo...