**Daily update | 07 July, 2022**

# StackExchange

#### Can there be functions $g$ and $f$ such that $\rho_{f(X),g(X+Y)}^2 > \rho_{X,X+Y}^2$

**Source:** stats**Views:** 19**Score:** 4**Tags:** self-study mathematical-statistics correlation

#### Distribution of sample variance of independent but not identically distributed normals

**Source:** stats**Views:** 12**Score:** 4**Tags:** mathematical-statistics normal-distribution chi-squared-distribution

#### Parameter estimation of state-space models with hidden variables

**Source:** stats**Views:** 23**Score:** 3**Tags:** regression time-series estimators hidden-markov-model kalman-filter

#### Are mixed models necessary if random effects estimates are close to zero?

**Source:** stats**Views:** 27**Score:** 3**Tags:** mixed-model random-effects-model

#### What is wrong with treating everything as a hyperparameter?

**Source:** stats**Views:** 9**Score:** 3**Tags:** machine-learning hyperparameter