Which of the following control charts is/are for variables?
A)x-bar chart only
B)R-chart only
C)p-chart only
D)both x-bar and R-charts

Question

Quizplus · Accepted Answer

X-bar chart and R-chart are both control charts for variables. X-bar chart is used to monitor the central tendency of the process, while R-chart is used to monitor the process variability. Together, they provide a comprehensive view of the process performance. P-chart, on the other hand, is a control chart for attributes data, which measures the proportion of nonconforming items in a sample.

Which of the Following Control Charts Is/are for Variables