A Quality Analyst Wants to Construct a Sample Mean Chart

question 123

Multiple Choice

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 standard deviation of the sampling distribution of sample means?

• A)0.1 ounces
• B)0.4 ounces
• C)0.5 ounces
• D)1 ounces
• E)2 ounces

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