To construct and use any control chart,first ________.
A)gather one sample data from a production process
B)gather all the data from a production process
C)gather at least 25 to 30 samples of data of a fixed sample size n from a production process
D)gather exactly 50% of the data from a production process

Question

Quizplus · Accepted Answer

To construct and use a control chart, we need to gather at least 25 to 30 samples of data of a fixed sample size (n) from a production process. This is necessary to establish a baseline or stable process behavior. Gathering one sample or all the data may not provide enough information to determine what is normal variation and what is a signal of a problem. Gathering exactly 50% of the data is arbitrary and does not provide enough information to establish a control chart.

To Construct and Use Any Control Chart,first ________