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The moving ranges involved are serially correlated so runs or cycles can show up on the moving average chart that do not indicate real problems in the underlying process. [ 2 ] : 237 In some cases, it may be advisable to use the median of the moving range rather than its average, as when the calculated range data contains a few large values ...
Shewhart framed the problem in terms of assignable-cause and chance-cause variation and introduced the control chart as a tool for distinguishing between the two. Shewhart stressed that bringing a production process into a state of statistical control , where there is only chance-cause variation, and keeping it in control, is necessary to ...
Using other methods it was found that it could be: 80.2% European, 18.1% Amerindian and 1.7% African. [194] A 2010 autosomal DNA study found the Argentine population to average 78.5% European, 17.3% Native American, and 4.2% sub-Saharan African, in which 63.6% of the tested group had at least one ancestor who was Indigenous . [ 195 ]
The Subgraph Isomorphism problem is NP-complete. The graph isomorphism problem is suspected to be neither in P nor NP-complete, though it is in NP. This is an example of a problem that is thought to be hard, but is not thought to be NP-complete. This class is called NP-Intermediate problems and exists if and only if P≠NP.
The Caribbean (/ ˌ k ær ɪ ˈ b iː ən, k ə ˈ r ɪ b i ən / KARR-ib-EE-ən, kə-RIB-ee-ən, locally / ˈ k ær ɪ b i æ n / KARR-ib-ee-an; [4] Spanish: el Caribe; French: les Caraïbes; Dutch: de Caraïben) is a subregion in the middle of the Americas centered around the Caribbean Sea in the North Atlantic Ocean, mostly overlapping with the West Indies.