By Atta-ur Rahman
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In statistics it is still known as a feature of a distribution derived from the moments. 5). Empirical normal distributions often exhibit left (positive) or right (negative) skewness, in other words they are not symmetrical around the arithmetic mean. 1 Basic Statistics 29 creases with increasing deviation of the mean from the median or the mode (modal value). ) Positive or negative kurtosis occurs if the convexity of the empirical distribution is more acute or smoother than the curvature of the ideal normal distribution.
2, Part G, Springer, Berlin, 1995 a Einax, J. ): Chemometrics in Environmental Chemistry. Applications, in the series: Hutzinger, O. ): Handbook of Environmental Chemistry, Vol. : Anal. Chem. : J. Assoc. Off. Anal. Chem. : Lecture, 5th International Conference on Chemometrics, Leipzig, 27. 1. : Chemometrics: A Textbook, Elsevier, Amsterdam, 1988, p. : Environmental Analysis, Wiley, Chichester, New York, Brisbane, Toronto, Singapore, 1994, pp. E. in: Glick, D. ): Methods of Biochemical Analysis, Vol.
First of all, it should be pointed out that data are only series of numbers. These numbers are worthless because they have no meaning. This data are only meaningful if used in a human context. One very important (in most cases the ultimate) goal is the support of decisions. So, with the aid of decisions, we come to conclusions concerning reality ± and this is what we really need. We should remember that an ordered set of data can be written in the form of a matrix, which in most instances contains the values of measured or known properties (variables, features) listed in columns.