Data are collected by a manufacturer about an industrial robot that is used 24 hours/ day, 7 days per week, recording both the intervals in days between breakdowns and the time taken to repair each...

Data are collected by a manufacturer about an industrial robot that is used 24 hours/

day, 7 days per week, recording both the intervals in days between breakdowns and

the time taken to repair each fault that causes a breakdown. The following data are

collected:

Times before breakdown ðin daysÞ: 21:4 18:5 36:7 19:8 22:3 27:9 24:1

30:2 25:0 8:6

Time to repair faults ðdaysÞ: 0:4 0:7 2:0 0:1 0:6 3:5 0:5 0:2 1:3 0:8

Calculate the mean time before failure, the mean time to repair, and the

availability of the machine.