**Daily update | 22 April, 2023**

# StackExchange

#### Calculating the distribution of $X-Y$

**Source:** stats**Views:** 58**Score:** 3**Tags:** probability distributions convolution

#### Why is the p-value of Pearson's correlation test large even when the sample size is sufficient?

**Source:** stats**Views:** 59**Score:** 3**Tags:** correlation p-value pearson-r

#### Do all NP-hard problems have a reduction from one to another?

**Source:** cs**Views:** 33**Score:** 2**Tags:** np-complete reductions np-hard np

#### Relevance of the homoscedasticity assumption

**Source:** stats**Views:** 39**Score:** 2**Tags:** regression hypothesis-testing inference econometrics heteroscedasticity

#### Bounding the Variance of Conditional Gaussians

**Source:** stats**Views:** 28**Score:** 2**Tags:** normal-distribution variance conditional-probability multivariate-normal-distribution