A new printing machine is set or calibrated to print 25 copies per minute. On each of four days, the printer's output is measured five times. The data will be used to construct a process control chart to monitor the printing process. The results of the printing process are in the following table. 
What is the value of the lower control limit factor for a range chart?
Definitions:
Dopamine
A neurotransmitter of the biogenic amine group; important in motor function.
cAMP Signal Transduction
A cellular signaling pathway involving the secondary messenger cyclic AMP (cAMP) which mediates a variety of physiological responses.
Adenylyl Cyclase
Enzyme responsible for catalyzing the conversion of ATP to cyclic AMP (cAMP).
Protein Kinase
An enzyme that modifies other proteins by chemically adding phosphate groups, playing a crucial role in cellular signaling and function.
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