A Quality Analyst Wants to Construct a Sample Mean Chart $\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Weight }$

question 94

Essay

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.
$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Weight }$
$\begin{array}{|l|l|l|l|l|}\hline \text { Day } & \text { Package 1 } & \text { Package 2 } & \text { Package 3 } & \text { Package 4 } \\\hline \text { Monday } & 23 & 22 & 23 & 24 \\\hline \text { Tuesday } & 23 & 21 & 19 & 21 \\\hline \text { Wednesday } & 20 & 19 & 20 & 21 \\\hline \text { Thursday } & 18 & 19 & 20 & 19 \\\hline \text { Friday } & 18 & 20 & 22 & 20\\\hline\end{array}$
(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?

Understand the impact of legislation on nursing practice and patient care.

Appreciate the importance of patient advocacy in nursing.

Recognize the significance of nurse’s involvement in policy-making and legislation.

Understand the concept of professional accountability and autonomy in nursing.

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Definitions:

Benefit

An advantage or profit gained from something.

Excludable

A characteristic of a good or service that allows its owner to prevent others from using it without paying for it.

Free Rider

A person who receives the benefit of a good but avoids paying for it

Free-Rider

An individual who benefits from resources, goods, or services without paying for the cost of the benefit.