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Ten successive heats of a steel alloy are tested for hardness. The resulting data are shown in the following table. Set up a control chart

Ten successive heats of a steel alloy are tested for hardness. The resulting data are shown in the following table. Set up a control chart for the moving range and a control chart for individual hardness measurements. ( only Control limits)

Heat: 1 2 3 4 5 6 7 8 9 10 Hardness: 52 51 54 55 50 52 50 51 58 59

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