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Apple Quaker nut bar is produced at a highly automated facility. One of the quality control factors is the weight of each bar. Samples of

Apple Quaker nut bar is produced at a highly automated facility. One of the quality control factors is the weight of each bar. Samples of 8 bars are taken regularly and adjustments are made based on the outcome of quality control process. Average weights and ranges of the latest 10 samples are reported as following:

SampleAverage weight (gram)Average Range
1494
2545
3547
4535
5547
6463
7517
8496
9474
10464

  1. What is the lower control limit of
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