Controller

Output Controller of the company in the control of 50 randomly selected products found that 37 of them had no defect 8 has only one flaw, three had two defects, and two products had three defects. Determine the standard deviation and coefficient of variation.

Correct result:

s =  0.7746
c =  1.9365

Solution:

m=(37 0+8 1+3 2+2 3)/50=25=0.4 r=(37 (0m)2+8 (1m)2+3 (2m)2+2 (3m)2)/50=(37 (00.4)2+8 (10.4)2+3 (20.4)2+2 (30.4)2)/50=35=0.6 s=r=0.6=0.7746
c=s/m=1.9365



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