Refer To Table 30 1 Factor For Comesting Control Chart Limits 3 Sigma For This Problem Eagletrons Are Al Electric Auto 1 (14.43 KiB) Viewed 11 times
Refer To Table 30 1 Factor For Comesting Control Chart Limits 3 Sigma For This Problem Eagletrons Are Al Electric Auto 2 (41.26 KiB) Viewed 11 times
Refer to Table 30.1-Factor for Comesting Control Chart Limits (3 sigma) for this problem Eagletrons are al-electric automobiles produced by Mogul Motors, Inc. One of the concems of Mogul Motors is that the Eagletrons be capable of achieving appropriate maximum speeds. To monitor this, Mogul executives take samples of ten Eagletrons at a time For each sample, they determine the average maximum speed and the range of the maximum speeds within the sample They repeat this with 35 samples to obtain 35 sample means and 35 ranges. They find that the average sample mean is 90.50 miles per hout, and the average range is 3.00 miles per hour. Using these results, the executives decide to establish an R-chart. They would like this chart to be established so that when it shows that the range of a sample is not within the control limits, there is only approximately a 0.0027 probability that this is due to natural variation The control limits for the chart based on the above requirement for the given information are: UCLAmes per hour (round the reponse to three decimal places)
Definition Sample Size, n 2 3 4 5 6 7 8 9 10 12 Mean Factor, A₂ 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 0.266 Upper Range, D4 3.268 2.574 2.282 2.115 2.004 1.924 1.864 1.816 1.777 1.716 Lower Range, D3 0 0 0 0 0 0.076 0.136 0.184 0.223 0.284
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