An important measure for McDonald's restaurants is the order time, which is the amount of time it takes between when a customer places an order and when the customer receives his or her food. A local McDonald's restaurant has told its employees that the maximum amount for order time should be 2.75 minutes. Ordering time data was collected for five randomly selected customers per day for 10 days. Mean Range
Day 1 2.22 1.4
Day 2 1.45 0.4
Day 3 1.72 0.6
Day 4 1.56 0.6
Day 5 1.92 0.9
Day 6 1.71 0.5
Day 7 3.20 2.5
Day 8 2.37 1.3
Day 9 1.89 0.3
Day 10 1.30 .2
Xbar = 1.934
Rhat =0.9
The standard deviation of the process is 0.55. With z = 3, what is the Cpk?Is the process capable of meeting customer specifications?
a) 0.49, capable
b) 0.31, not capable
c) 1.17 capable
d) 0.31, capable
e) 1.17, not capable
f) 0.49, not capable