A manufacturer of ink-jet printer checks samples of 50 printers for functionality at the conclusion of the assembly process. The results of 10 samples are shown below
Sample # 1 2 3 4 5 6 7 8 9 10
# defective 1 16 9 9 4 8 7 7 6 5
What are the lower and upper 3-sigma control limits?
What sample is out of control?