Energy Consumption. Exercises 1-5 refer to the amounts of energy consumed in the author’s home. (Most of the data are real, but some are fabricated.) Each value represents energy consumed (kWh) in a...

Energy Consumption. Exercises 1-5 refer to the amounts of energy consumed in the author’s home. (Most of the data are real, but some are fabricated.) Each value represents energy consumed (kWh) in a two-month period. Let each subgroup consist of the six amounts within the same year. Data are available for download at www.TriolaStats.com

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.

Extracted text: Sept.-Oct. 3432 Nov.-Dec. Mar.-April July-Aug. 3704 2288 Jan.-Feb. 3637 May-June 2359 Year 1 2446 2888 2482 2762 2423 Year 2 4463 2483 2073 2579 3128 3348 2858 Year 3 2661 3375 2296 2749 3286 2266 2812 2433 Year 4 2937 2774 578 3427 Year 5 3792 3395 4003 3118 4249 4016 3458 Year 6 3360 2919 2946 5081 Year 7 5261 3063 3370 3710 3327 4480 3853 3174 Year 8