<Tr> <Td> </Td> <Td> This article may require cleanup to meet Wikipedia's quality standards . No cleanup reason has been specified . Please help improve this article if you can . (January 2010) (Learn how and when to remove this template message) </Td> </Tr> <Table> <Tr> <Td> </Td> <Td> This article possibly contains original research . Please improve it by verifying the claims made and adding inline citations . Statements consisting only of original research should be removed . (July 2008) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article possibly contains original research . Please improve it by verifying the claims made and adding inline citations . Statements consisting only of original research should be removed . (July 2008) (Learn how and when to remove this template message) </Td> </Tr> <P> A ranking is a relationship between a set of items such that, for any two items, the first is either' ranked higher than',' ranked lower than' or' ranked equal to' the second . In mathematics, this is known as a weak order or total preorder of objects . It is not necessarily a total order of objects because two different objects can have the same ranking . The rankings themselves are totally ordered . For example, materials are totally preordered by hardness, while degrees of hardness are totally ordered . If two items are the same in rank it is considered a tie . </P>

Share 2-3 examples of how statistics is used in the real world