A quality analyst wants to construct a sample mean chart for controlling a packaging process.He knows from past experience that the process standard deviation is two ounces.Each day last week,he randomly selected four packages and weighed each.The data from that activity appears below. 
(a)Calculate all sample means and the mean of all sample means.
(b)Calculate upper and lower control limits that allow for natural variations.
(c)Is this process in control?
Definitions:
Questionable Practices
Activities or behaviors that are dubious in nature and may be considered as unethical, unprofessional, or legally gray.
Corporate Philanthropy
A company's initiative to assess and take responsibility for its effects on environmental and social well-being, often involving charitable donations or community service programs.
Continuum of Social Responsibility
A spectrum reflecting the varying degrees of commitment or approaches organizations can take toward social responsibility.
Reaction
The response or change in behavior that occurs as a result of an external stimulus or situation.
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