Exercise 13

Assume that the following failure data for one component type has been recorded (in months)

8,9,7,6,12,18,14,18*,6,9,11,24,30*,28*

where failure times with a star (*) represent censoring failure times.

Problem 1

Konstruct a Kaplan Meier plot for the data.

Problem 2

Find the ML-estimates if you assume a Weibull model for the data. Insert the Weibull survivor function in Problem 1 by using the ML-estimates.