Which of the following is true of common cause variation
A) It can be controlled and described using nonstatistical methods.
B) It appears at random, and individual sources cannot be identified or explained.
C) It accounts for about 10 to 15 percent of the observed variation in a process.
D) It arises from external sources that are not inherent in a process.

Question

Quizplus · Accepted Answer

Common cause variation is also known as random variation and appears at random without any identifiable or explainable individual sources. It cannot be controlled by nonstatistical methods and accounts for the majority of variation in a process. It is inherent to the process and arises from internal sources. Therefore, options A, C, and D are incorrect.

Which of the Following Is True of Common Cause Variation