SCENARIO 18-6
the Maker of a Packaged Candy Wants to Evaluate

question 31

Essay

SCENARIO 18-6
The maker of a packaged candy wants to evaluate the quality of her production process. On each of
16 consecutive days, she samples 600 bags of candy and determines the number in each day's sample
that she considers to be of poor quality. The data that she developed follow. $$\begin{array} { r c c } \underline {\text { Day }} & \begin{array} { c } \text { Number } \\\underline {\text { Poor }}\end{array} & \begin{array} { c } \text { Proportion } \\\underline {\text { Poor }}\end{array} \\1 & 33 & 0.0550000 \\2 & 29 & 0.0483333 \\3 & 31 & 0.0516667 \\4 & 32 & 0.0533333 \\5 & 43 & 0.0716667 \\6 & 45 & 0.0750000 \\7 & 46 & 0.0766667 \\8 & 48 & 0.0800000 \\9 & 48 & 0.0800000 \\10 & 46 & 0.0766667 \\11 & 28 & 0.0466667 \\12 & 32 & 0.0533333 \\13 & 28 & 0.0466667 \\14 & 32 & 0.0533333 \\15 & 31 & 0.0516667 \\16 & 24 & 0.0400000\end{array}$$
-Referring to Scenario 18-6, construct a p control chart for these data.

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Definitions:

Keratitis

Inflammation of the cornea, the clear outer layer at the front of the eye, potentially caused by infection or injury.

Blepharitis

An inflammation of the eyelid margins, often causing redness, irritation, and itchy eyelids together with dandruff-like scales on the eyelashes.

Lacrimal

Pertaining to the glands and ducts that produce and drain tears.

Cortex

The outer layer of various organs and structures, such as the brain, adrenal glands, and hair, involved in diverse functions.