A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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In biostatistics, fixed-effects may mean population-average effects. In econometrics, fixed-effects may represent the observed quantities in terms of explanatory variables that are treated as if the q…
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Robustness in general refers to a statistic's insensitivity to deviations from its underlying assumptions (Huber and Ronchetti, 2009).
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A discrete, univariate distribution modelling the number of ${\rm Bernoulli}(p)$ trial successes until a specified number of failures occur.
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A non-negative continuous probability distribution indexed by two strictly positive parameters.
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Distance functions refer to functions used for quantifying the notion of distance between members of a set, or between objects.
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'Large data' refers to situations where the number of observations (data points) is so large that it necessitates changes in the way the data analyst thinks about or conducts the analysis. (Not to be …
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Psychometrics has evolved as a subfield of psychology to become the science of measurement of unobservable individual characteristics.
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Refers to data generated from a distribution that has a countable sample space. Discrete data may be nominal (e.g. the distribution of race in a sample of individuals) or ordinal (e.g. the number of e…
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Convergence generally means that a sequence of a certain sample quantity approaches a constant as the sample size tends to infinity.
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collected repeatedly on the same subjects. When there is a long series of data, time series analysis may be appropriate. For shorter series, mixed models (a…
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Generalized Linear Mixed (effects) Models are typically used for modeling non-independent non-normal data (eg, longitudinal binary data).
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Average most often refers to the arithmetic mean, but more generally to measures of central tendency that use most, or all, of the data values. Examples include trimmed mean, Winsorized mean, harmonic…
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a graphical representation of the frequencies of a continuous variable. The variable is divided into bins and a bar is drawn for each bin, proportional to its frequency in the data.
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a test for goodness of fit of data to a distribution. It is often used to test whether a variable is normally distributed.
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Ranking means identifying the ordering from highest to lowest or vice versa; statistical ranks are the values 1, 2, 3, ..., up to the sample size, assigned to values or attributes which have the highe…
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The quantiles of a distribution refer to points on its cumulative distribution function. Some common quantiles are quartiles and percentiles.
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Refers to the probability distribution of parameters conditioned on data in Bayesian statistics.
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Refers to any statistical complication or problem due to having few data.
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The science of statistics applied to the analysis of biological or medical data.
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"Mixed effects models" refers to models that have both fixed effects and random effects. They are used to model longitudinal data or data that are clustered & thus do not have independent errors.
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decided upon after the data has been collected, as opposed to "a priori".
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called continuous if its set of possible values is uncountable, and the chance that it takes any particular value is zero ($\text{P}(X = x) = 0$ for every real number $x$). A …
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Skewness measures (or refers to) a degree of asymmetry in the distribution of a variable.
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Causal inference tries to quantify the effect of a change in $X$ on $Y$ whilst holding constant or eliminating all other relevant factors which might influence this relationship.
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one that is written as a convex combination of other distributions.
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Refers to techniques for classifying data into categories based on similarities (which can either be known previously, or learned).
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A distribution describing the time between events in a Poisson process; a continuous analogue of the geometric distribution.
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the study of the distribution and spread of disease or illness at the population level.
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Descriptive statistics summarize features of a sample, such as mean and standard deviations, median and quartiles, the maximum and minimum. With multiple variables, may include correlations and crosst…
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The uniform distribution describes a random variable that is equally likely to take any value in its sample space.
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the process of assessing whether the results of an analysis are likely to hold outside of the original research setting. DO NOT use this tag for discussing `validity` of a measurement or…
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one whose joint distribution is constant over time. A weakly stationary process or series is one whose mean and covariance function (variance and autocorrelati…
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Tables of counts (occasionally proportions of marginal counts), arranged by (at least) two marginal categories, displaying bivariate or multivariate frequencies. Sometimes called crosstabs.
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A mathematical quantity designed to measure the amount of randomness of a random variable.