Answers to QET HW Set #2
Kales Problem 5.1
- MTTF = 1000
- lambda = 0.001
- 2r degrees of Freedom = 20
- 20% Confidence MTTF = 798.8 lambda = 0.00125
- 80% Confidence MTTF = 1371.9 lambda = 0.00073
Kales Problem 5.6
- MTTF = 1.18 E+6
- R(1000 h) = 0.99915092
- R (100,000 h) = .91856372
Homework Problem - Web HW#2
Maximum KS value 0.26305 with 7 cells
Corresponding KS risk = .301 at 5%
Passes as Exponential Distribution
Total Test time = 46642 km
r failues = 19
MTTF = 2454.8
Lambda = 0.0004074
MTTF 5% Conf = 1484.9 km /f lamda = 0.0006734
MTTF 95% = 4298.4 km/f lambda = 0.0002326
Reliability at 1000 km = 0.6654
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