Question: Energy Consumption: R Chart

Let each subgroup consist of the 6 values within a year. Construct an R chart and determine whether the process variation is within statistical control. If it is not, identify which of the three out of control criteria lead to rejection of statistically stable variation.

Test before 14 – Energy Consumption: Notation After finding the values of the mean and range for each year, find the values of = and –

Then find the values of LCL and UCL for an R chart and for an x chart.

See Energy Consumption Appendix B