One hundred computers were randomly selected from 10,000 manufactured during last year’s production. The times of failure were noted for each system. Some systems had multiple failures, while others...

One hundred computers were randomly selected from 10,000 manufactured during last year’s production. The times of failure were noted for each system. Some systems had multiple failures, while others did not work initially when the customer tried to use the system. Determine what modeling distribution(s) could be appropriate to describe the failures.