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uality Management 15% New York Roasting Company sells bags of roasted coffee beans to local coffee shops in New York City. The company is worried
uality Management 15% New York Roasting Company sells bags of roasted coffee beans to local coffee shops in New York City. The company is worried that their process might be producing bags that are either too heavy or too light. To investigate, they decided on a sample size of 12 bags and collected data for 7 days. The mean and range of the bag weights is shown below: Day Mean Range 1 24.9 1.8 2 24.2 1.1 3 26.3 2.8 4 25.4 1.5 5 25.1 1.2 6 25.3 1.2 7 24.8 1.5 8 25.2 2.5 a) What are the number of samples used by New York Roasting Company? b) What is the sample size? c) Insert the X-bar chart below: d) Insert the Range chart below: e) Is the process in control or out of control? If the process is out of control, specify the exact chart you used to determine that it was out of control and the exact samples that are out of bounds. f) For the x-bar chart, what is the UCL and LCL? g) For the range chart, what is the UCL and LCL? h) If New York Roasting Company wants exactly 25.25 pounds of coffee
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