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  1. Simpson's paradox - Wikipedia

    Simpson's paradox is a phenomenon in probability and statistics in which a trend appears in several groups of data but disappears or reverses when the groups are combined.

  2. Simpson’s Paradox (Stanford Encyclopedia of Philosophy)

    Mar 24, 2021 · The following article provides a mathematical analysis of the paradox, explains its role in causal reasoning and inference, compares theories of what makes the paradox seem …

  3. Simpson’s paradox | Definition, Example, and Explanation

    Nov 20, 2025 · Simpson’s paradox, in statistics, an effect that occurs when the marginal association between two categorical variables is qualitatively different from the partial …

  4. Simpsons Paradox Explained - Statistics by Jim

    What is Simpsons Paradox? Simpsons Paradox is a statistical phenomenon that occurs when you combine subgroups into one group. The process of aggregating data can cause the apparent …

  5. Simpson's Paradox | Brilliant Math & Science Wiki

    Simpson's paradox occurs when groups of data show one particular trend, but this trend is reversed when the groups are combined together. Understanding and identifying this paradox …

  6. What Is Simpson’s Paradox? - Science ABC

    Oct 19, 2023 · Simpson's Paradox points to reversal of trends when a dataset is divided into subgroups or vice versa. Thus, Simpson’s Paradox tells that data alone cannot be the …

  7. Simpson's Paradox - Data Science Discovery

    Simpson's Paradox refers to a phenomenon in which a trend appears in different groups of data but disappears or reverses when these groups are combined. In other words, the overall …

  8. Simpson's Paradox: When Aggregated Data Tells a Different …

    Nov 22, 2024 · Simpson’s Paradox occurs when a trend that appears in aggregated data reverses when the data is divided into subgroups. It demonstrates that relationships between variables …

  9. Simpson's Paradox -- from Wolfram MathWorld

    Dec 22, 2025 · Simpson's paradox, also known as the amalgamation paradox, reversal paradox, or Yule-Simpson effect, is a paradox in which a statistical trend appears to be present when …

  10. 21.2 Simpson’s Paradox | A Guide on Data Analysis - Bookdown

    Simpson’s Paradox occurs when a trend in an overall dataset reverses when broken into subgroups. This happens due to data aggregation issues, where differences in subgroup sizes …