Statistical Quality Control Quiz

What does SQC stand for?

• Standard Quality Control

• Statistical Quality Control

• Statistical Question Control

• Standard Question Control

Which of the following is the main purpose of Statistical Quality Control?

• To measure the quality of raw materials

• To improve customer satisfaction

• To monitor and control process performance

• To reduce the number of defective products

Which of the following charts is used to monitor the variation in the process over time?

• Histogram

• Control chart

• Pareto chart

• Scatter diagram

The centerline in a control chart represents:

• The mean of the sample data

• The upper control limit

• The lower control limit

• The range of the data

Which of the following is used to detect the changes in the variation of the process?

• X-bar chart

• R-chart

• P-chart

• All of the above

Which chart is used to monitor the proportion of defectives in a sample?

• X-bar chart

• P-chart

• C-chart

• R-chart

What does the term "Six Sigma" refer to?

• A method to control the variation in a process

• A measure of process performance

• A statistical process control technique

• None of the above

Which of the following statements is true for a process under statistical control?

• All measurements are identical

• All measurements lie within control limits

• There is no variation in the process

• The process is not subject to any external variation

In a control chart, if a point falls outside the control limits, it suggests:

• The process is in control

• The process is out of control

• The sample is random

• The process is stable

The range in the R-chart is calculated using:

• The difference between the highest and lowest sample values

• The mean of the sample data

• The standard deviation of the sample data

• The difference between the upper and lower control limits