Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and chemometrics......click here for more. 
Home Univariate Data Distributions TScores  
See also: zTransform  
TScoresTscores are sometimes used to characterize results in the medical literature (for example, in ivestigations on osteoporosis). Tscores are comparable to zscores and can be calculated from zscores by the following simple formula: T = z*10 + 50 Thus the Tscores are scaled in a way that the mean becomes 50 and the standard deviation becomes 10. By means of this scaling most of the Tscores fall into the range between zero and hundred, which is sometimes said to be interpreted easier than zscores (I sometimes ask myself, whether medical personell is actually thought to be incapable of interpreting zscores).
In some papers though the term "Tscores" are used synonymically to zscores. Further there is the possibilitiy to mix up the Tscores and the tvalues obtained in the one sample ttest  which contributes to even more confusion. In summary, Tscores should be avoided whenever possible.


Home Univariate Data Distributions TScores 