Question: A chocolate company makes candy bars to be used by elementary schools for fund-raising. One of the important quality characteristics is the weight of the

A chocolate company makes candy bars to be used by elementary schools for fund-raising. One of the important quality characteristics is the weight of the bar. To monitor the weights, the production team wants to use process control charts. Data for 30 samples of 4 bars each are as follows:

Use Excel to develop an R chart to determine if the range of the process is stable or not.

SampleCandy Barl Bar2 Bar 4 8.30 8.50 7.86 7.43 49 7.75 6.56 7.45 6.82 6.70 7.18 8.08 7.78 7.02 7.18 7.07 7.81 7.16 8.52 8.69 10 7.64 7.86 6.68 7.99 12 6.83 13 6.64 6.37 6.96 14 6.40 7.32 15 7.58 7.32 16 7.42 6.88 7.62 8.16 7.16 19 7.04 6.35 8.10 7.12 21 7.31 7.81 6.64 7.81 23 8.04 7.22 8.04 6.48 24 6.94 6.85 25 7.44 7.18 7.61 8.11 6.83 27 8.22 7.28 8.72 8.59 7.92

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Sample Candy Bar 1 Candy Bar 2 Candy Bar 3 Candy Bar 4 x Max Min R 1 83 85 685 786 788 85 685 165 2 ... View full answer

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