A Quality Analyst wants to construct a control chart for determining whether five machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, four units of putputs from each machine are collected:

Machine	Measurement 1	Measurement 2	Measurement 3	Measurement 4
M1	112	113	116	112
M2	110	108	124	118
M3	123	117	110	125
M4	108	122	116	120
M5	118	116	127	121

Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits.

a.M2

b.Process is in Control

c.M1

d.M4

e.M5

f.M3