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  2. Statistical data type - Wikipedia

    en.wikipedia.org/wiki/Statistical_data_type

    In statistics, data can have any of various types. Statistical data types include categorical (e.g. country ), directional ( angles or directions , e.g. wind measurements), count (a whole number of events), or real intervals (e.g. measures of temperature ).

  3. Statistics - Wikipedia

    en.wikipedia.org/wiki/Statistics

    There are two major types of causal statistical studies: experimental studies and observational studies. In both types of studies, the effect of differences of an independent variable (or variables) on the behavior of the dependent variable are observed. The difference between the two types lies in how the study is actually conducted.

  4. List of probability distributions - Wikipedia

    en.wikipedia.org/wiki/List_of_probability...

    The Kent distribution on the two-dimensional sphere. The Kumaraswamy distribution is as versatile as the Beta distribution but has simple closed forms for both the cdf and the pdf. The logit metalog distribution, which is highly shape-flexible, has simple closed forms, and can be parameterized with data using linear least squares.

  5. List of statistical tests - Wikipedia

    en.wikipedia.org/wiki/List_of_statistical_tests

    They also have the disadvantage of being less certain in the statistical estimate. [7] Type of data: Statistical tests use different types of data. [1] Some tests perform univariate analysis on a single sample with a single variable. Others compare two or more paired or unpaired samples. Unpaired samples are also called independent samples.

  6. Mean - Wikipedia

    en.wikipedia.org/wiki/Mean

    There are several kinds of means (or "measures of central tendency") in mathematics, especially in statistics. Each attempts to summarize or typify a given group of data, illustrating the magnitude and sign of the data set. Which of these measures is most illuminating depends on what is being measured, and on context and purpose. [2]

  7. Data analysis - Wikipedia

    en.wikipedia.org/wiki/Data_analysis

    The quality of the data should be checked as early as possible. Data quality can be assessed in several ways, using different types of analysis: frequency counts, descriptive statistics (mean, standard deviation, median), normality (skewness, kurtosis, frequency histograms), normal imputation is needed. [111]

  8. Descriptive statistics - Wikipedia

    en.wikipedia.org/wiki/Descriptive_statistics

    The use of descriptive and summary statistics has an extensive history and, indeed, the simple tabulation of populations and of economic data was the first way the topic of statistics appeared. More recently, a collection of summarisation techniques has been formulated under the heading of exploratory data analysis : an example of such a ...

  9. Analytic and enumerative statistical studies - Wikipedia

    en.wikipedia.org/wiki/Analytic_and_enumerative...

    Analytic and enumerative statistical studies are two types of scientific studies: In any statistical study the ultimate aim is to provide a rational basis for action. Enumerative and analytic studies differ by where the action is taken. Deming first published on this topic in 1942. [1]