A Quality Analyst Wants to Construct a Sample Mean Chart

question 90

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 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each: $$\begin{array} { r } { \text { Weight (ounces) } }\\\begin{array} { l l l l l } \text { Day } \\\hline \text { Monday } & 23 & 22 & 23 & 24 \\\text { Tuesday } & 23 & 21 & 19 & 21 \\\text { Wednesday } & 20 & 19 & 20 & 21 \\\text { Thursday } & 18 & 19 & 20 & 19 \\\text { Friday } & 18 & 20 & 22 & 20\end{array}\end{array}$$ What is the sample mean package weight for Thursday?

• A) 19 ounces
• B) 20 ounces
• C) 20.6 ounces
• D) 21 ounces
• E) 23 ounces

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Definitions:

Associating

The cognitive process of linking ideas, memories, or experiences together in one's mind.

Positive Reinforcement

A process in behavioral psychology where the likelihood of a behavior is increased by following it with a pleasurable or rewarding stimulus.

Negative Reinforcement

A behavioral concept where the removal of an unpleasant stimulus strengthens a particular behavior.

Positive Punishment

A form of behavior modification that adds an unfavorable outcome or event following an undesired behavior, with the intention of decreasing that behavior in the future.