Colonel Electric is a large company that produces light bulbs and other electrical products. A particular light bulb is supposed to have an average life of around 1,000 hours before it burns out. Periodically, the company tests 5 of them and measures the average time before they are founded. The following table gives results for those 10 samples:

a. What is the general average of these means? What is the average range?

b. What are the upper and lower control limits for a control chart with 99.7%. You can use the Excel-QM program to solve it.

MUESTRA MUESTRA MUESTRA NUM I R NUM I R NUM. X R 63.5 2.0 10 63.5 1.3 18 63.6 1.8 63.6 1.0 11 63.3 1.8 19 63.8 13 63.7 1.7 12 63.2 1.0 20 63.5 1.6 63.9 0.9 13 63.6 1.8 21 63.9 1.0 63.4 1.2 14 63.3 1.5 22 63.2 1.8 63.0 1.6 15 63.4 1.7 23 63.3 1.7 63.2 1.8 16 63.4 1.4 24 64.0 2.0 63.3 1.3 17 63.5 1.1 25 63.4 1.5 10 63.7 1.6 MUESTRA 1 2 3 4 5 6 7 8 9 10 Media 979 1087 1080 934 1072 1007 952 986 1063 958 Rango 50 94 57 65 135 134 101 98 145 84 Tomada de Render, B., Stair, R. M., Hanna, M. E & Hale, T. S. (2018). Quantitative Analysis for Management. (13 ed). Pearson