A control chart on which the proportions of nonconforming units in subgroups of size n are plotted versus time is a(n)_____ chart.
A) $\overline { \mathrm { X } }$
B)R
C)p
D)C

Question

Quizplus · Accepted Answer

A chart that plots the proportion of nonconforming units over time is a p-chart, as it measures the proportion of nonconformances in a subgroup of size n. Option A is incorrect as a control chart plotting the means of subgroup averages is an $\overline { \mathrm { X } }$ chart. Option B refers to the range of subgroup data, while option D is a control chart that tracks the number of nonconforming items in a subgroup.

A Control Chart on Which the Proportions of Nonconforming Units X‾\overline { \mathrm { X } }X

A Control Chart on Which the Proportions of Nonconforming Units $\overline { \mathrm { X } }$