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a. Consider two different types of motors. Motor A has a characteristic life of (4062) hours...

a. Consider two different types of motors. Motor A has a characteristic life of (4062) hours and a shape parameter β = 0.9. Motor B has a characteristic life of (462) hours with a shape parameter β = 2.8. Which of these offers better reliability for 100 hours? Which of these offers better reliability for 500 hours? b. A different gasket (known to be at constant failure rate) has a MTBF of 10 months. 1. What is the reliability at (231) days? 2. How many days does it take for the reliability to fall to a 90% level? 3. How many days does it take for the reliability to fall to a 80% level? c. Given that a complex software system averages (72) errors per 20,000 lines of code, you are looking at managing a 10,000 line program. What is the probability of exactly 0, 1, and 2 errors in 10 000 lines of code? What is the probability of 2 or more errors? Show calculations below, with answers to two decimal places. # of errors Probability 0 1 2 >2 100. 00 %

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