You test some components with a Weibull distribution at temperatures of 100 Celcius and 60 Celcius. At those temperatures you estimate a characteristic life of 15000 hours and 25000 hours respectively. hint: Boltzmann's constant is 7. 1 T.

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You test some components with a Weibull
distribution at temperatures of 100 Celcius and
60 Celcius. At those temperatures you estimate
a characteristic life of 15000 hours and 25000
hours respectively. hint: Boltzmann's constant is
k = 8.617 x 10-5. Temperature in Celcius +
273.15 = temperature in Kelvin. If n is an integer,
T(n) = (n – 1)
a) Using linear regression, estimate the
Arrhenius model parameters A and AH.
b) Give the MTTF, median, and 90th percentile
at T = 20 Celcius. Assume that the shape
parameter is 0.5
Transcribed Image Text:You test some components with a Weibull distribution at temperatures of 100 Celcius and 60 Celcius. At those temperatures you estimate a characteristic life of 15000 hours and 25000 hours respectively. hint: Boltzmann's constant is k = 8.617 x 10-5. Temperature in Celcius + 273.15 = temperature in Kelvin. If n is an integer, T(n) = (n – 1) a) Using linear regression, estimate the Arrhenius model parameters A and AH. b) Give the MTTF, median, and 90th percentile at T = 20 Celcius. Assume that the shape parameter is 0.5
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