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a. inherent variation.
b. special cause variation.
c. common cause variation.
d. standard variation.
.................................. c. common cause variation.
>>>>>>>>>>>>>> c. common cause variation. >>>>>>>>>>>>>>>>
common cause variation...............................
c>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Agree with experts answer <<<<<<<<<<<<<<<
common cause variation................
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c. common cause variation...............
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My answer is same as experts of option (C)
The answer is : Option ( C )