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Jim, a quality control manager at an apparel manufacturing company, studies and monitors quality using R-charts. He discovers a quality problem with the construction of zippers. Jim proposes that 25 samples of eight observations each be collected on a daily basis. He plans to prepare an R-chart to monitor the variation in the size of the zippers. The data collected shows that the mean length of the zippers is 15 inches and the average range is 0.5 inches. If D 3 for the R-chart is 0.136, the lower control limit (LCL R) for the R-chart will be:
1830
The year marked by significant global events, including revolutions in Europe advocating for more democratic governments and the start of the French colonization of Algeria.
1850
A year marked by significant events such as the passage of the Fugitive Slave Act in the United States, as part of the Compromise of 1850.
Nullification
The theory that states have the right to invalidate any federal law deemed unconstitutional, emphasizing state sovereignty.
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