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  2. Skewness - Wikipedia

    en.wikipedia.org/wiki/Skewness

    The skewness value can be positive, zero, negative, or undefined. For a unimodal distribution (a distribution with a single peak), negative skew commonly indicates that the tail is on the left side of the distribution, and positive skew indicates that the tail is on the right. In cases where one tail is long but the other tail is fat, skewness ...

  3. Box plot - Wikipedia

    en.wikipedia.org/wiki/Box_plot

    Figure 2. Box-plot with whiskers from minimum to maximum Figure 3. Same box-plot with whiskers drawn within the 1.5 IQR value. A boxplot is a standardized way of displaying the dataset based on the five-number summary: the minimum, the maximum, the sample median, and the first and third quartiles.

  4. Affect measures - Wikipedia

    en.wikipedia.org/wiki/Affect_measures

    The International Positive and Negative Affect Schedule Short Form (I-PANAS-SF) is a shortened version of the PANAS, intended to only contain cross-culturally well understandable emotion words. In contrast to an earlier ad hoc created short forms of the PANAS, [ 11 ] the I-PANAS-FX has been developed in a multi-study procedure including studies ...

  5. Probability distribution fitting - Wikipedia

    en.wikipedia.org/wiki/Probability_distribution...

    When the smaller values tend to be farther away from the mean than the larger values, one has a skew distribution to the left (i.e. there is negative skewness), one may for example select the square-normal distribution (i.e. the normal distribution applied to the square of the data values), [1] the inverted (mirrored) Gumbel distribution, [1 ...

  6. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    As such it may not be a suitable model for variables that are inherently positive or strongly skewed, such as the weight of a person or the price of a share. Such variables may be better described by other distributions, such as the log-normal distribution or the Pareto distribution.

  7. File:Negative and positive skew diagrams (English).svg ...

    en.wikipedia.org/wiki/File:Skewness_Statistics.svg

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  8. Nonparametric skew - Wikipedia

    en.wikipedia.org/wiki/Nonparametric_skew

    In statistics and probability theory, the nonparametric skew is a statistic occasionally used with random variables that take real values. [ 1 ] [ 2 ] It is a measure of the skewness of a random variable's distribution —that is, the distribution's tendency to "lean" to one side or the other of the mean .

  9. Tripartite Model of Anxiety and Depression - Wikipedia

    en.wikipedia.org/wiki/Tripartite_Model_of...

    Negative affect is the factor that is common to both anxiety and depression. Negative affect can be defined as, "the extent to which an individual feels upset or unpleasantly engaged, rather than peaceful". [1] It involves negative mood states such as subjective distress, fear, disgust, scorn, and hostility. [9]