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# Time Period kWh Year 1: Jan/Feb Year 1: March/Apr Year 1: May/June Year 1: July/Aug Year 1: Sept/Oct Year 1: Nov/Dec Year 2: Jan/Feb Year 2:...

14. Refer to Data Set 12 on the attached Excel chart and use the amounts of electricity consumed (in k Wh) in the author’s home. Let each subgroup consist of the six amounts within the same year, so that there are eight subgroups with six amounts in each subgroup. Let each subgroup consist of the six values within a year. Construct a 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 a statistically stable variation.
Time Period kWh Cost Deg Days AvTemp Col 6 Col 7 Col 8 Col 9 Year 1: Jan/Fe 3637 295.33 2226 29 Year 1: March 2888 230.08 1616 37 Year 1: May/Ju 2359 213.43 479 57 Year 1: July/A 3704 338.16 19 74 Year 1: Sept/O 3432 299.76 184 66 Year 1: Nov/D 2446 214.44 1105 47 Year 2: Jan/Fe 4463 384.13 2351 28 Year 2: March 2482 295.82 1508 41 Year 2: May/Ju 2762 255.85 657 54 Year 2: July/A 2288 219.72 35 68 Year 2: Sept/O 2423 256.59 308 62 Year 2: Nov/D 2483 276.13 1257 42 Year 3: Jan/Fe 3375 321.94 2421 26 Year 3: March 2661 221.11 1841 34 Year 3: May/Ju 2073 205.16 438 58 Year 3: July/A 2579 251.07 15 72 Year 3: Sept/O 2858 279.8 152 67 Year 3: Nov/D 2296 183.84 1028 48 Year 4: Jan/Fe 2812 244.93 1967 33 Year 4: March 2433 218.59 1627 39 Year 4: May/Ju 2266 213.09 537 66 Year 4: July/A 3128 333.49 26 71 Year 4: Sept/O 3286 370.35 116 Year 4: Nov/D 2749 222.79 1457 Year 5: Jan/Fe 3427 316.18 253 Year 5: March 578 77.39 1811 Year 5: May/Ju 3792 385.44 632 Year 5: July/A 3348 334.72 35 Year 5: Sept/O 2937 330.47 215 Year 5: Nov/D 2774 237 1300 Year 6: Jan/Fe 3016 303.78 2435 Year 6: March 2458 263.75 1540 Year 6: May/Ju 2395 207.08 395 Year 6: July/A 3249 304.83 26 Year 6: Sept/O 3003 305.67 153 Year 6: Nov/D 2118 197.65 1095 Year 7: Jan/Fe 4261 470.02 2554 Year 7: March 1946 217.36 1708 Year 7: May/Ju 2063 217.08 569 Year 7: July/A 4081 541.01 3 Year 7: Sept/O 1919 423.17 58 Year 7: Nov/D 2360 256.06 1232 Year 8: Jan/Fe 2853 309.4 2070 Year 8: March 2174 254.91 1620 Year 8: May/Ju 2370 290.98 542 Year 8: July/A 3480 370.74 29 Year 8: Sept/O 2710 329.72 228 Year 8: Nov/D 2327 229.05 1053

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14. Refer to Data Set 12 on the attached Excel chart and use the amounts of electricity
consumed (in kWh) in the author’s home. Let each subgroup consist of the six amounts
within the same year,...

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