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Question: Hockey pucks used by the National Hockey

Hockey pucks used by the National Hockey League (NHL) and other professional leagues weigh an average of 163 grams (5.75 ounces). A quality inspector monitors the manufacturing process for hockey pucks. She takes eight samples of n = 10. It is believed that puck weights are normally distributed, and when the production process is in control, μ = 163 and σ = 7.5. A portion of the data, measured in grams, is shown in the accompanying table. Hockey Puck Weights (in grams)
Hockey pucks used by the National Hockey League (NHL) and other professional leagues weigh an average of 163 grams (5.75 ounces). A quality inspector monitors the manufacturing process for hockey pucks. She takes eight samples of n = 10. It is believed that puck weights are normally distributed, and when the production process is in control, μ = 163 and σ = 7.5. A portion of the data, measured in grams, is shown in the accompanying table.
Hockey Puck Weights (in grams)


In a report, use the above information to
a. Prepare a control chart that specifies a centerline as well as an upper control limit (UCL) and a lower control limit (LCL).
b. Determine, using the control chart, whether the process is in control

In a report, use the above information to a. Prepare a control chart that specifies a centerline as well as an upper control limit (UCL) and a lower control limit (LCL). b. Determine, using the control chart, whether the process is in control





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# 1 # 2 # 3 # 4 #5 #6 #7 # 8 162.2 165.8 156.4 165.3 168.6 167.0 186.8 | 178.3 159.8 166.2 156.4 173.3 175.8 171.4 160.4 163.0 160.3 160.6 152.2 166.4 168.2 168.4 176.8 171.3


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