a. Consider two different types of motors. Motor A has a characteristic life of (4034) hours...

a. Consider two different types of motors. Motor A has a characteristic life of (4034) hours
and a shape parameter β = 0.9. Motor B has a characteristic life of (434) 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 (217) 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 (44) 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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Expert Solution

genius_generous answered 1 year ago

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