An Importer of Decorative Ceramic Tile Samples 50 Tiles Each

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. The centreline on the p chart for these data is

A) 0.250.
B) 1.83.
C) 2.5.
D) 0.167.
E) 6.1.

Correct Answer:

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