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?
Ans. C-chart should be used in this case.
C-chart shows how the process, measured by the number of non-conformities or defects per unit of an item, changes over time.
c = total number of defects/total number of samples
UCL = c+k√c
Center Line = c
LCL = c-k√c
This gives an idea of non-critical level of non-conformity.
The local newspaper receives several complaints per day about typographic errors. Over a seven-day period, the...
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 daily number of errors per newspaper: 4, 3, 2, 6, 7, 3, and 9. Based on these data alone, what type of control chart(s) should the publisher use? p-chart c-chart x-bar chart x-bar chart and R-chart. u-chart none of the above (what is your answer?)
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