2010-05-29_135541_Quality_Textiles

2010-05-29_135541_Quality_Textiles - Quality Textiles...

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Unformatted text preview: Quality Textiles International T he fol owing table shows 50 fabric weight m easurem ents of fabric sam ples col ected by the quality assurance departm ent: Observation Fabric W eight Calculate the M ean and the Standard deviation on the lab col ected sam ples. Is the m ean and standard deviation stil the sam e as the original process? 1 2.78 2 2.46 Mean of the sample of 50 fabric weights is 2.98 oz/in^2 and the standard deviation is 0.52 oz. These values are dif erent from the established values of 2.73 and 0.31 for the process. 3 3 4 2.8 Build a histogram of the data frequencies. 5 2.71 6 2.61 7 3.12 8 3.02 9 2.94 10 2.44 11 3.06 12 2.9 13 2.74 14 2.57 15 2.06 16 2.32 17 2.62 18 2.41 19 2.43 20 3.44 21 2.69 22 2.36 Bins Frequency 23 1.92 2.45 9 24 2 2.85 14 25 2.63 3.25 9 26 2.75 3.65 13 27 2.79 4.05 5 28 2.81 29 2.81 30 2.43 31 2.86 32 3.09 33 3.18 34 3.26 35 3.29 36 3.3 37 3.3 T he upper and lower control lim its (U CL and LCL) established for this process were 3.66 and 1.8 respectively. Construct a control chart to represent the operation. Is the process stil in control?T he upper and lower control lim its (U CL and LCL) established for this process were 3....
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This note was uploaded on 11/07/2011 for the course ACC 220 taught by Professor - during the Spring '10 term at University of Phoenix.

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