It can be thus be considered as non parametric. It can be interpreted in terms of probability - it is the difference between the probabilities that the variables vary in the same direction and the probabilities that the variables vary in the opposite direction. When the number of observations is lower than 50 and when there are no ties, XLSTAT gives the exact p-value. The latter is known as being reliable when there are more than eight observations. The polychoric correlation coefficient characterizes the relation between two ordinal variables. It is frequently used to analyze survey data with ordinal responses.
Under the assumption that the ordinal variables are derived from the discretization of two unobserved quantitative random variables with a normal distribution, the polychoric correlation coefficient aims to measure the relation between those two unobserved quantitative variables. XLSTAT also provides options such as filtering (using R2) and sorting (BEA or FPC method) the variables.Answers at several levels spring to mind here, for your friend in some cases. I have never used Xlstat and have only a vague idea of what it is. However, the generic question here is of some interest and concern.ĭon't use any software which does not allow this kind of question to be answered. As I understand it, even Excel itself allows calculations of correlations, although I haven't tried examining their documentation.
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If this seems a counsel of perfection, consider that high quality statistical software is available for free in the form of R.Īny company selling software has an obligation to its customers to provide technical support quite what that includes or excludes will vary, but asking the company will be a test of their quality and seriousness. Depending on the age and style of the software, online help may be supplemented with printed manuals.Ī way of asking is to provide worked examples of small dataset(s) and the correlations and P-values that Xlstat provides.
#XLSTAT SPEARMAN PDF#
Read PDF Statistics For Business And Economics Students Solutions Manual Xlstat For Pearson Education Access Code Card Mystatlab For Business Statistics Access Card 12th Edition includes new sections on graphs, robust estimation, expected value and the bootstrap, in addition to new material on the use of computers. Then others might be motivated to compare with results from other software.Īs I understand it, Steiger's z test is for a highly specific correlation problem I guess, but I guess confidently, that use of such a test is highly unlikely in a program like this.
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