Question: For a variable control a circuit voltage will be measured on a sample of only five circuits. The past average voltage for sample size 5 has been 3.1 volt, and the range has ben 1.2 volts.
What are the upper and lower control limits for the resuling control charts (average and range).
Five sample of voltage are taken with results:
sample 5
x= 3.6, 3.3, 2.6, 3.9, 3.4
R= 2.0, 2.6, 0.7, 2.1, 2.3
what action should be taken?