A machine at the Pacific Fruit Company fills boxes with raisins. The labeled weight of the boxes is 9 ounces. The company wants to construct an R-chart to monitor the filling process and make sure the box weights are in control. The quality-control department for the company sampled five boxes every two hours for three consecutive working days. The sample observations are as follows:

Construct an R-chart from these data with 3σ control limits, plot the sample range values, and comment on processcontrol.

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Box Weights (oz 9.06 9.138.978.85 8.46 8.52 8.61 9.099.2 8.95 9.35 8.95 9.209.0 8.42 9.179.21 9.0509.53 9.21 8.87 8.71 905 9.35 8.74 8.35 8.5098.89 9.00 9.219.05 .3 8.78 9.15 9.209.23 9.159.06 9.98 8.908.819.05 9.13 9.03 9.109.269.48.47 9.53 9.02 9.11.8B 8.92 8.95 9.109.00906 8.95 Samples