A Process Control Chart:
A)Assumes That 99 $\pm$ 2 Standard Deviations from the Center Line
C)Separates the Assignable

Multiple Choice

A process control chart:

A) Assumes that 99.74% of random variations observed will fall within an upper and lower limit
B) Represents upper and lower control limits set at $\pm$ 2 standard deviations from the center line
C) Separates the assignable cause of variation from the common cause of variation
D) Assigns causes of variation to operator,machine,or material
E) Both a and c