**Daily update | 09 September, 2023**

# StackExchange

#### Prove that $\mathbb{E}\vert X \vert^{a}<\infty$ iff $\sum\limits_{n=1}^{\infty}n^{a-1}\mathbb{P}(\vert X \vert \geqslant n)<\infty$

**Source:** stats**Views:** 80**Score:** 4**Tags:** probability self-study

#### Splines, logistic regression and sample size considerations

**Source:** stats**Views:** 23**Score:** 2**Tags:** logistic binary-data splines degrees-of-freedom nonlinearity

#### Given a set of railroad tracks of certain shapes, find all closed tracks that can be build with it

**Source:** cs**Views:** 19**Score:** 1**Tags:** computational-geometry

#### Simulate time series with periodic spikes

**Source:** stats**Views:** 149**Score:** 1**Tags:** time-series simulation seasonality

#### Ensemble mean of a fraction

**Source:** stats**Views:** 33**Score:** 1**Tags:** mathematical-statistics covariance