Comparison (mathematical) | Statistical data types

Ordinal data

Ordinal data is a categorical, statistical data type where the variables have natural, ordered categories and the distances between the categories are not known. These data exist on an ordinal scale, one of four levels of measurement described by S. S. Stevens in 1946. The ordinal scale is distinguished from the nominal scale by having a ranking. It also differs from the interval scale and ratio scale by not having category widths that represent equal increments of the underlying attribute. (Wikipedia).

Ordinal data
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Logistic regression | Choropleth map | Mann–Whitney U test | Wilcoxon signed-rank test | Sign test | Regression analysis | Ordinal regression | Bar chart | Mosaic plot | Contingency table | Level of measurement | Analysis of variance | Goodman and Kruskal's gamma | Ordered probit | Ranking | Survey (human research) | Kolmogorov–Smirnov test | Jonckheere's trend test | Nonparametric statistics | Page's trend test | Kendall's W | Information theory | Ordinal number | Interval scale | Friedman test | Pie chart | List of analyses of categorical data | Student's t-test | Somers' D | Nominal scale | Spearman's rank correlation coefficient | Statistical data type | Ordered logit | Kendall rank correlation coefficient | Ratio scale | Wald–Wolfowitz runs test | Likert scale | Kruskal–Wallis one-way analysis of variance