An Importer of Decorative Ceramic Tile Samples 50 Tiles Each

question 7

Essay

An importer of decorative ceramic tile samples 50 tiles each day from incoming shipments. Some tiles are cracked or broken before or during transit, rendering them useless scrap. Sampling from incoming shipments for 30 days reveals that a total of 250 tiles are cracked or broken.
a. What type of control chart should be used by the importer in monitoring the proportion of scrap tiles?
b. Calculate the centreline for this control chart.
c. Calculate the control limits for this control chart.

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Definitions:

Moneyed Interests

Parties or individuals with significant financial resources and the influence that comes with them.

Trustworthy Expert

An individual recognized for their knowledge and integrity in a specific field, regarded as reliable and dependable for advice or opinions.

Mentally Stable

Describing a state of psychological well-being where one can effectively manage daily stress and make sound decisions.