Refer to Exercise 17.19. a. Using the least-squares estimates of and , find and graph the

Refer to Exercise 17.19.

a. Using the least-squares estimates of α and β, find and graph the hazard rate, z(t).

b. Compute the hazard rate at time t = 4 years and interpret its value.

Data from Exercise 17.19

Suppose the life length (in years) of a memory chip in a mainframe computer has a Weibull failure time distribution. To estimate the Weibull parameters, α and β, 50 chips were placed on test and the number of survivors was recorded at the end of each year, for a period of 8 years. The data are shown in the accompanying table.

Transcribed Image Text:

МЕМСHIP Year 1 2 4 5 6 7 8 47 Number of Survivors 39 29 18 11 5 3 1 3.