Techniques of Approximation

The cesium [hydrogen bis(sulfate)] tetracyanoplatinate complex exhibits a room-temperature electrical conductivity (four probe technique) of approximately 113 ohms 1 cm 1, while that of the Rb analog (Pt—Pt - 2.83 A) is 1500-2000 ohms"1 cm 1. 

Let the pdf of the rth highest concentration out of a sample of m values be denoted pr.m (c). Once this pdf is known, all the statistical properties of the random variable cnm can be determined. However, the integrals involved in the expressions for the expectation and higher-order moments are not always easily evaluated, and thus there arises the need for techniques of approximation. The most important result concerns the evaluation of the expected value of crm. In fact, for sufficiently large m, an approximation for E cr[Pg.1162]

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