A control chart for R is shown below. Determine whether the process variation is within statistical control. If it
is not, identify which of the three out-of-control criteria lead to rejection of statistically stable variation. 
Definitions:
Ambient Light
The natural or surrounding light present in an environment without any artificial illumination.
Caffeine Intake
The amount of caffeine consumed by an individual, usually measured in milligrams per day.
Periods Of Sleep
Different stages that occur during sleep, including REM (rapid eye movement) and non-REM phases, both crucial for restorative processes.
Television
An electronic device that receives broadcast signals and displays them as moving images and sound, used for entertainment, information, and education.
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