IDS371_HW01_Solution_2

IDS371_HW01_Solution_2 - HW02 Homework assignment number 2...

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1 HW02 – Homework assignment number 2 – Chapter 12 (SPC QA/QC). For backup you should electronically submit the answers as a MS Word document with any Excel or Minitab work pasted into that document to our Blackboard site in addition to submitting a printed copy in class at the beginning of the class. For all questions, where appropriate, show hand calculations and provide equivalent Minitab analysis that verify your answers. You may use Minitab descriptive statistics (mean and variance) instead of computing those by hand. In addition, your answers must explain the physical situation and conclusions drawn from the analysis. The practice exam questions are multiple choice but to get any credit for these you must show the calculations or reasoning you used to arrive at the answers. Note: In addition to showing the detailed work that backs up all of the answers have a summary sheet at the beginning of your submittal that succinctly shows your answers. Each question is worth the same number of points. 1. Textbook problem 12.26. Table 12.6 gives data on the losses (in dollars) incurred by a hospital in treating DRG 209 (major joint replacement) patients. The hospital has taken from its records a random sample of 8 such patients each month for 15 months. (a) Make an s control chart using center lines and limits calculated from these past data. There are no points out of control. (b) Because the s chart is in control, base the x-bar chart on all 15 samples. Make this chart. Is it also in control? Sample Standard Sample Loss (dollars) mean deviation 1 6835 5843 6019 6731 6362 5696 7193 6206 6360.6 521.7 2 6452 6764 7083 7352 5239 6911 7479 5549 6603.6 817.1 3 7205 6374 6198 6170 6482 4763 7125 6241 6319.8 749.1 4 6021 6347 7210 6384 6807 5711 7952 6023 6556.9 736.5 5 7000 6495 6893 6127 7417 7044 6159 6091 6653.2 503.7 6 7783 6224 5051 7288 6584 7521 6146 5129 6465.8 1034.3 7 8794 6279 6877 5807 6076 6392 7429 5220 6609.2 1104.0 8 4727 8117 6586 6225 6150 7386 5674 6740 6450.6 1033.0 9 5408 7452 6686 6428 6425 7380 5789 6264 6479.0 704.7 10 5598 7489 6186 5837 6769 5471 5658 6393 6175.1 690.5 11 6559 5855 4928 5897 7532 5663 4746 7879 6132.4 1128.6 12 6824 7320 5331 6204 6027 5987 6033 6177 6237.9 596.6 13 6503 8213 5417 6360 6711 6907 6625 7888 6828.0 879.8 14 5622 6321 6325 6634 5075 6209 4832 6386 5925.5 667.8 15 6269 6756 7653 6065 5835 7337 6615 8181 6838.9 819.5
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IDS371_HW01_Solution_2 - HW02 Homework assignment number 2...

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