Question: 1 A pollution control device at an area factory is designed to reduce particulates in plant emissions. Emissions are sampled periodically to determine if the

1 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 Sample Mean Sample Mean 389 8 387 15 388 2 383 9 16 383 389 10 396 17 387 386 11 386 388 388 12 390 19 384 390 13 383 20 380 7 381 381 21 380 398 18 3 4 5 6 14 a. Compute x-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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