Problem:
Consider a product that is "settled in." Its MTBF distribution has been found to be normal with a mean of 10,000 hours and a standard deviation of 100 hours.
Required:
Question 1) What is the probability of a breakdown before 8,000 hours? Before 9,000 hours? Would you prefer a policy of preventive maintenance, or a policy of breakdown maintenance, on this product?
Explain your choice. A good logical explanation is critical in this discussion.Provide thorough explanation of the given question.