Question: A pollution control device at an area factory is designed to reduce particulates in plant emissions. Emissions are sampled periodically to determine if the pollution

A pollution control device at an area factory is designed to reduce particulates in plant emissions. Emissions are sampled periodically to determine if the pollution control device is in statistical control. The means of 21 samples of n = 6 are shown below. Sample Mean 1 388 2 396 3 389 4 386 5 388 6 390 7 381 Sample 8 9 10 11 12 13 14 Mean 395 398 396 386 390 383 381 Sample 15 16 17 18 19 20 21 Mean 398 383 387 388 384 380 380 a. Compute I-chart control limits for this process. Assume that the mean range for the 21 samples is 44. (Do not round intermediate calculations. Round your answers to 2 decimal places.) UCL LCL b. Is the process in control? Yes O No

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