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Variations in the process that are considered to be normal process variables are called:
a. Common causes b. Uncommon causes c. Special causes d. Random causes
................a. Common causes
Common causes are the normal variations in the process
I think the answer is:
a. Common causes
Thank you for the invitation. There 2 major types of variation: common which is inherent in the process and special which is caused by changes in the environment.
Two types of variables:
1- common which is inherent in the process
2- special which is caused by changes in the environment