**Daily update | 27 July, 2022**

# StackExchange

#### Three versions of the independent two sample t-test (and R)

**Source:** stats**Views:** 25**Score:** 4**Tags:** anova t-test standard-error lm

#### Can we construct a pair of random variables having any given covariance?

**Source:** stats**Views:** 326**Score:** 4**Tags:** covariance-matrix

#### Training with extremely imbalanced Dataset

**Source:** stats**Views:** 67**Score:** 4**Tags:** machine-learning unbalanced-classes object-detection yolo

#### Valid model comparison/selection? Poisson, negative binomial, zero-inflated poisson, z-i negative binomial with AIC

**Source:** stats**Views:** 138**Score:** 3**Tags:** r model-selection count-data model-comparison zero-inflation

#### What happens when DQN gradients become too big?

**Source:** stats**Views:** 23**Score:** 3**Tags:** regression neural-networks reinforcement-learning gradient-descent