Numerical Description of Data

Chapter

Abstract

The graphic procedures described in the last chapter help us to visualize the pattern of a data set. To obtain a more objective summary description and a comparison of data sets, we must go one step further and formulate quantitative measures for important aspects such as the location of center of the data and the amount of variability present in the data. To effectively present the ideas and associated formulas, it is convenient to represent a data set by symbols to prevent the discussion from becoming anchored to a specific set of numbers. A data set consists of a number of measurements symbolically represented by \(x_1, x_2, \cdots, x_n\). The last subscript n denotes the number of measurements in the data and \(x_1, x_2, \cdots,\) represents the first observation, the second observation and so on.

Keywords

Test Score Central Tendency Modal Choice Serum Cholinesterase Graphic Procedure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Supplementary material

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Department of Statistics and Mathematical SciencesKwara State UniversityMaleteNigeria

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