A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: 
What is the value of A2,the control limit factor for averages?
Definitions:
Middle Adulthood
A life stage typically ranging from about the ages of 40 to 65, characterized by stability in relationships, career, and personal identity, as well as facing the challenges of aging.
Career Goals
Long-term objectives related to a person's professional development and progression in their chosen field or occupation.
Conscientiousness
A personality trait characterized by being thorough, careful, or vigilant; it implies a desire to do a task well.
Early Adulthood
A life stage occurring from the late teens or early twenties to the mid-thirties, characterized by physical maturity, identity exploration, and the establishment of personal and professional relationships.
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