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BELL SYSTEM TECHNICAL JOURNAL 



4. Apply one or more of the four methods of comparing the theoreti- 

 cal and observed distributions to determine which one is 

 theoretically the best." 



An illustration of the method of applying this form of analysis to 

 inspection data on transmitters is indicated in the schematic chart 

 Fig. 12. The ohj^'ci df tlie inspection of apparatus in the process 



P.r.. auj 



Fig. IJ 



of manufacture is ol)\i()Usl\- to determine (lie most probable law of 

 distribution, and from this to determine wliether or not tiierc is any 

 indication of a trend in the quality of the product. In the light of 

 what has been said, it is obvious that a complete report of this char- 

 acter should contain the items called for in Fig. 12. The corrected 



" If the oliscrvcd distrihiition could not have .iriscn from a random system 

 of causes, it may he advisahic to attempt to transform it into an approximately 

 random one, such as was done in connection with llic data in Fig. 6. 



