Question: TABLE SG.1 SAMPLE SIZE n Factors for Computing Control Chart Limits (3 sigma) MEAN FACTOR UPPER RANGE, LOWER RANGE, D D Cum.co Lecture Exercise #11

TABLE SG.1 SAMPLE SIZE n Factors for Computing

TABLE SG.1 SAMPLE SIZE n Factors for Computing Control Chart Limits (3 sigma) MEAN FACTOR UPPER RANGE, LOWER RANGE, D D Cum.co Lecture Exercise #11 2 1.880 0 3.268 2.574 3 1.023 0 4 .729 2.282 0 5 2.115 0 .577 .483 6 0 2.004 1.924 7 .419 0.076 8 .373 1.864 0.136 9 337 1.816 0.184 10 .308 1.777 0.223 12 .266 1.716 0.284 We wish to determine if screw production is in statistical control. We have no prior information, other than the 5 samples (where each sample has 4 observations) Number 1 2 3 4 Sample 1 0.5014 0.5022 0.5009 0.5027 Sample 2 0.5021 0.5041 0.5032 0.5020 Sample 3 0.5018 0.5026 0.5035 0.5023 Sample 4 0.5008 0.5034 0.5024 0.5015 Sample 5 0.5041 0.5056 0.5034 0.5039 1. Compute the sample range and mean for each of the 5 samples. 2. Compute , the average of the sample means, and R, the average of 2 the sample ranges. 3. Construct the X-chart to check if the sample mean is in control 4. Construct the Range chart to check if process variation is in control

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