Question

round to 3 decimal places ?

A) Set the control limits for the process for the x(bar) chart when the maching is working properly UCL-x-? grams (round to two decimal places) LCL-x grams (round to two decimal places) B) Set the control limits for this process for the R-chart. UCLrgrams (round to two decimal places) LCLr grams (round to two decimal places) Refer to the table Factors for Computing Control Chart Limits (3 sigma) for this problem. Your supervisor, Lisa Lehmann, has asked that you report on the output of a machine on the factory flcor. This machine is supposed to be producing optical lenses with a mean weight of 50 grams and a range of 3.5 grams. The following table contains the data for a sample size of n = 6 taken during the past 3 hours Sample 1 10 49 57 Sample Size, n Mean Factor, 2 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 0.266 Upper Range, Lower Range, 3 3.268 2.574 2.282 2.115 2.004 1.924 1.864 1.816 0.076 0.136 0.184 0.223 0.284 10 12 1.716 Show transcribed image text

Answer 1

R bar chart: R bar chart 5.1 3.1 2.1 2 0.1 10 0.9 UCLRLCL_Mean It is evident for R-chart that the process does not cross the limit that is upper and lower control limit and therefore is under control. A) The control limits for the process for the x-bar chart when the machine is working properly UCL-X-53.45 grams (rounded to two decimal places) LCL-x = 50.55 grams (rounded to two decimal places) B) The control limits for this process for the R-chart. UCL-r- 6.01 grams (rounded to two decimal places) LCL-r-0 grams (rounded to two decimal places)