A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.He knows from past experience that whenever this process is under control,package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces.Each day last week,he randomly selected four packages and weighed each with the following results: 
What is the sample mean package weight for Thursday?
Definitions:
Earn
To receive payment or reward for work performed or for the provision of goods or services.
Economic Values
The monetary, material, or assessed worth of an asset, good, or service, which is determined by the market or by individual or societal preferences.
Annual Rate
Annual rate, often used in the context of loans and investments, refers to the percentage that signifies the yearly cost of funds or the yearly return on investment.
Annual Rate
Typically refers to the interest rate for a whole year, as opposed to a shorter period, on a loan, investment, or deposit.
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