The measurements of weight of 100 units of a product manufactured by two parallel processes have same mean but the standard of process A is 15 while that of B is 7. What can you conclude?
-
More data is needed to draw a conclusion.
-
The weight of units in process A are grouped closer than in process B.
-
The weight of units in process B are grouped closer than in process A.
-
Both processes are out of control.