Given the following data for the number of defects per spool of cable.
OBSERVATION
Observation: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Number of defects: 2 3 1 0 1 3 2 0 2 1 3 1 2 0
Determine three-sigma control limits using the above data (Do not round intermediate calculations.)
UCL=
LCL=