Cross Validated

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• Newest Questions - Cross Validated

  Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization

• regression - What is difference-in-differences? - Cross Validated

  Difference in differences has long been popular as a non-experimental tool, especially in economics. Can somebody please provide a clear and non-technical answer to the following questions about

• Tour - Cross Validated

  Cross Validated Teams Now available on Stack Overflow for Teams! AI features where you work: search, IDE, and chat. Learn moreExplore Teams Teams Q&A for work Connec...

• What does standard deviation tell us in non-normal distribution - Cross Validated

  In a normal distribution, the 68-95-99.7 rule imparts standard deviation a lot of meaning, but what would standard deviation mean in a non-normal distribution (multimodal or skewed)? Would all data

• Exchangeability and IID random variables - Cross Validated

  Every IID sequence of random variables is considered to be exchangeable, i understand why its necessary for the random variables to be identically distributed to assume exchangeability, but why the...

• Convention for symbols indicating statistical significance? - Cross Validated

  This question might probably also fit into Academia.SX. I'm writing my first paper in life sciences and I'm very often seeing asterisks as indicators for statistical significance (*). I'm wonderin...