Answer:
1.46
Step-by-step explanation:
The computation of the process capability ratio is shown below:
= (Upper specification limits - lower specification limits) ÷ (6 × standard deviation)
= (2,200 hours - 1,500 hours) ÷ (6 × 80 hours)
= 700 hours ÷ 480 hours
= 1.46
Simply we take the difference of specified limited and then divide it by the standard deviation by multiplying it by 6 so that the correct ratio can come
All other information which is given is not relevant. Hence, ignored it