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Industrial Statistics with Minitab by Xavier Tort-Martorell Llabres, Lluis Marco Almagro, Pere Grima Cintas

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20.1 File ‘MOTORS’

A factory that makes motors for small appliances registers the daily units produced, and those that in the final inspection were defective. The file named MOTORS.MTW contains the data of six weeks of production. This file is organized as follows:
Column Variable Label
C1 Date Date corresponding to data in the row.
C2 Production Daily number of produced motors.
C3 Number of defects Daily number of defective motors.

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