The local newspaper receives several complaints per day about typographic errors. Over a seven-day period, the publisher has received calls from readers reporting the following total daily number of errors: 4, 3, 2, 6, 7, 3, and 9. Based on these data alone, what type of control chart(s) should the publisher use?
A) p-chart
B) c-chart
C) x-bar chart
D) R-chart
E) x-bar chart and R-chart

Question

Quizplus · Accepted Answer

The number of errors reported each day can be counted and represented using a c-chart, which is appropriate for counting the number of nonconformities in a sample of constant size. An x-bar chart or R-chart is not appropriate as there is no continuous measurement being taken. A p-chart is also not appropriate as it is used for the proportion of nonconforming items in a sample.

The Local Newspaper Receives Several Complaints Per Day About Typographic