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The Awake Coffee Company produces gourmet instant coffee. The company wants to be sure that the average fill of coffee containers is 12.0 ounces. To make sure theprocess is in control, a worker periodically selects at random a box of six containers of coffee and measures their weight. When the process is in control, the rangeof the weight of coffee samples averages 0.6 ounces. Develop an R-chart and an -chart for this process and answer the questions.

The measurements of weight from the last five samples taken of the six containers follow:








Control limits for x-bar chart:
CL = , round your answer to 2 decimal places, the tolerance is +/-0.01
UCL = , round your answer to 2 decimal places, the tolerance is +/-0.03
LCL = , round your answer to 2 decimal places, the tolerance is +/-0.03

Control limits for R-chart:
CL = , round your answer to 2 decimal places, the tolerance is +/-0.01
UCL = , round your answer to 2 decimal places, the tolerance is +/-0.03
LCL = , round your answer to 2 decimal places, the tolerance is +/-0.03







Is the process in control?


The process is in control.

The process is not in control.






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Answer #1



clearly , the x-bar chart has many pt.s outside the ucl and lcl limits...but the R-chart is very good..so, the process is in control because the range is 0.6...But, the average weight of coffee samples differ slighly from 12 ounces!

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