Suppose that we take 10 samples of size n = 4 from a process than is known to be "in control," with results as follows:

Sample	Observations
1	57.0	60.0	58.0	58.0
2	57.0	62.0	57.0	57.0
3	59.0	64.0	64.0	59.0
4	62.0	58.0	56.0	62.0
5	56.0	57.0	57.0	57.0
6	61.0	59.0	60.0	61.0
7	58.0	58.0	60.0	56.0
8	62.0	65.0	61.0	56.0
9	55.0	57.0	60.0	57.0
10	60.0	62.0	58.0	60.0

If we used these to develop control limits, what would our upper control limit for the sample average (UCL_{x) be in this situation?}