Answer:
upper control limit = 6.058
lower control limit = 0.442
Step-by-step explanation:
Given that:
The numbers of sample n Mogul executives took = 8 Eagletrons at a time.
They find out that the average sample mean is 88.50 mph and;
the average range is 3.25 mph.
From the tables:
Control Limit = = 3.25
Therefore; the upper control limit and the lower control limit can be computed as follows:
upper control limit =
upper control limit = 1.864(3.25)
upper control limit = 6.058
lower control limit =
lower control limit = 0.136(3.25)
lower control limit = 0.442