Survival Analysis
15 questions across 2 topics. Also examined in CNET, ISS.
Hazard Function and Failure Rates, Censoring and Life Testing
- 174Failure rate of a series systemMSET June 2025Hazard Function and Failure Rates, Censoring and Life TestingHard
- 175Likelihood under Type I censoringMSET June 2025Hazard Function and Failure Rates, Censoring and Life TestingHard
- 173Exponential reliability — a scale-free coincidenceMSET April 2024Hazard Function and Failure Rates, Censoring and Life TestingMedium
- 175Type-II censored exponential data — the MLE of the meanMSET April 2024Hazard Function and Failure Rates, Censoring and Life TestingHard
- 173Probability one exponential competitor fails before anotherMSET March 2023Hazard Function and Failure Rates, Censoring and Life TestingEasy
- 174Recovering the CDF from a linear hazard functionMSET March 2023Hazard Function and Failure Rates, Censoring and Life TestingEasy
- 175Surviving past twice the mean lifetime, for an exponential systemMSET March 2023Hazard Function and Failure Rates, Censoring and Life TestingEasy
- 183Adding failure rates for a series system gives a bathtub-shaped, non-monotone hazardMSET December 2020Hazard Function and Failure Rates, Censoring and Life TestingMedium
- 190Series-system failure rates add for independent componentsMSET December 2020Hazard Function and Failure Rates, Censoring and Life TestingEasy
- 182Exponential reliability at 800 hours rises from a^2 to aMSET June 2019Hazard Function and Failure Rates, Censoring and Life TestingEasy
- 183Integrating the hazard: H(t)=t-ln(1+t) gives S(t)=(1+t)e^-tMSET June 2019Hazard Function and Failure Rates, Censoring and Life TestingEasy
- 91The Weibull hazard alphalambda^alpha t^alpha-1 increases iff alphage1MSET January 2018 Paper IIIHazard Function and Failure Rates, Censoring and Life TestingEasy
Series and Parallel Systems
- 174Reliability of a series-parallel systemMSET April 2024Series and Parallel SystemsMedium
- 92A parallel system fails only when every unit failsMSET January 2018 Paper IIISeries and Parallel SystemsEasy
- 144Components 1 and 2 in parallel, then 3 in seriesMSET April 2017 Paper IIISeries and Parallel SystemsEasy