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:

Self-Comparison

The act of comparing one's own abilities, achievements, and characteristics with those of others, often leading to self-evaluation or self-improvement.

Outcome Goals

Objectives or targets that individuals aim to achieve as a result of their actions, often focusing on the end result of activities rather than on the actions themselves.

Collective Efficacy

The shared belief within a group or community in their collective ability to organize and execute the courses of action required to achieve certain goals.

Social Understanding

The comprehension of societal norms, behaviors, and the manner in which individuals interact within a community.