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:
Parathyroid
Small endocrine glands located close to the thyroid gland.
Pituitary
A small gland at the base of the brain that produces hormones influencing growth, metabolism, and reproductive functions.
Adrenal
Pertaining to the adrenal glands, which sit atop each kidney.
Pancreas
An organ that secretes insulin and pancreatic digestive juice.
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