**Daily update | 08 May, 2023**

# StackExchange

#### $E[XY]-E[X^2]-E[Y^2]$, is there any special property?

**Source:** stats**Views:** 64**Score:** 2**Tags:** probability variance expected-value joint-distribution

#### Is bagging less useful in 'big data' settings?

**Source:** stats**Views:** 18**Score:** 2**Tags:** machine-learning bootstrap large-data ensemble-learning bagging

#### How to calculate P value in polychoric correlation

**Source:** stats**Views:** 11**Score:** 2**Tags:** correlation p-value polychoric

#### Is there a statistical test for five groups with averages ONLY?

**Source:** stats**Views:** 12**Score:** 2**Tags:** statistical-significance nonparametric descriptive-statistics biostatistics parametric

#### Linear algorithm to decide whether a DAG contains at least one incomparable pair of nodes

**Source:** cs**Views:** 129**Score:** 2**Tags:** algorithms dag directed-graphs topological-ordering