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  2. Psychometric software - Wikipedia

    en.wikipedia.org/wiki/Psychometric_software

    Testfact features - Marginal maximum likelihood (MML) exploratory factor analysis and classical item analysis of binary data - Computes tetrachoric correlations, principal factor solution, classical item descriptive statistics, fractal tables and plots - Handles up to 10 factors using numerical quadrature: up to 5 for non-adaptive and up to 10 ...

  3. Polychoric correlation - Wikipedia

    en.wikipedia.org/wiki/Polychoric_correlation

    In statistics, polychoric correlation [1] is a technique for estimating the correlation between two hypothesised normally distributed continuous latent variables, from two observed ordinal variables. Tetrachoric correlation is a special case of the polychoric correlation applicable when both observed variables are dichotomous .

  4. Contingency table - Wikipedia

    en.wikipedia.org/wiki/Contingency_table

    Another choice is the tetrachoric correlation coefficient but it is only applicable to 2 × 2 tables. Polychoric correlation is an extension of the tetrachoric correlation to tables involving variables with more than two levels. Tetrachoric correlation assumes that the variable underlying each dichotomous measure is normally distributed. [5]

  5. List of analyses of categorical data - Wikipedia

    en.wikipedia.org/wiki/List_of_analyses_of...

    Tetrachoric correlation; Uncertainty coefficient; Wald test; Binomial data. Bernstein inequalities (probability theory) Binomial regression;

  6. Phi coefficient - Wikipedia

    en.wikipedia.org/wiki/Phi_coefficient

    In statistics, the phi coefficient (or mean square contingency coefficient and denoted by φ or r φ) is a measure of association for two binary variables.. In machine learning, it is known as the Matthews correlation coefficient (MCC) and used as a measure of the quality of binary (two-class) classifications, introduced by biochemist Brian W. Matthews in 1975.

  7. Expert Trainer Reveals How to Stop Puppies From Having ...

    www.aol.com/expert-trainer-reveals-stop-puppies...

    Incomplete Potty Training. At the age of 3 months, puppies are still considered the equivalent of infants. Consider that their small bodies and minds are in the process of developing.

  8. Correlation coefficient - Wikipedia

    en.wikipedia.org/wiki/Correlation_coefficient

    A correlation coefficient is a numerical measure of some type of linear correlation, meaning a statistical relationship between two variables. [ a ] The variables may be two columns of a given data set of observations, often called a sample , or two components of a multivariate random variable with a known distribution .

  9. Three Hours To Change Your Life - images.huffingtonpost.com

    images.huffingtonpost.com/2013-01-04-ThreeHours...

    the first has somehow, in some way, been my best year yet. So, as I often say to participants in the workshop, “If a school teacher from Nebraska can do it, so can you!”