Question

When the purpose of sampling is to detect when a process becomes too variable, the chart of choice will be an R chart.

I picked true on this?

True
False

Answer 1

Since this is not my area of expertise, I searched Google under the key words "R chart" to get these possible sources:

http://en.wikipedia.org/wiki/XbarR_chart
http://www.qualityamerica.com/knowledgecente/knowctrInterpreting_an_Xbar_R_Chart.htm
http://www.java4less.com/charts_e.htm
http://www.itl.nist.gov/div898/software/dataplot/refman1/ch2/r_chart.pdf

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.