The Weibull Distribution Groups Step Progressive Stress Accelerated Life Test Of The Statistical Analysis

In Chapter2,we discuss the step-stress accelerated life test.Under typeI and typeII censoring of data from the Exponential Distribution, we first present a necessary and sufficient condition for the existence and uniqueness of the maximum likelihood estimators of the parameters for the distribution, then give two confidence intervals based on the MLE. Finally ,we compare them with results obtained in [8] by using Monte-carlo simulation.In Chapter3 ,we discuss the multiplicate progressive stresses accelerated life test .Under the Weibull Distribution and an invers power law model we first present a necessary and sufficient condition for the existence and uniqueness of MLE for the Exponential distribution, then give estimators and confidence intervals of the parameters based on the BLUE. Finally ,we study them by using Monte-carlo simulation.