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Coolio2654
  • Member for 5 years, 10 months
  • Last seen more than a month ago
  • Somewhere on planet Earth
1257 votes
27 answers
837k views

Making sense of principal component analysis, eigenvectors & eigenvalues

  • 12.9k
530 votes
23 answers
286k views

Why square the difference instead of taking the absolute value in standard deviation?

  • 5,545
481 votes
20 answers
169k views

The Two Cultures: statistics vs. machine learning?

  • 12k
388 votes
9 answers
763k views

What is the difference between fixed effect, random effect and mixed effect models?

  • 5,648
384 votes
7 answers
369k views

When conducting multiple regression, when should you center your predictor variables & when should you standardize them?

  • 4,251
266 votes
11 answers
181k views

How would you explain Markov Chain Monte Carlo (MCMC) to a layperson?

226 votes
4 answers
331k views

When (and why) should you take the log of a distribution (of numbers)?

  • 13.7k
223 votes
4 answers
418k views

How to interpret a QQ plot

  • 18.7k
207 votes
8 answers
463k views

In linear regression, when is it appropriate to use the log of an independent variable instead of the actual values?

  • 2,221
179 votes
3 answers
214k views

What is the difference between a consistent estimator and an unbiased estimator?

124 votes
4 answers
50k views

Is it possible to have a pair of Gaussian random variables for which the joint distribution is not Gaussian?

  • 2,589
107 votes
4 answers
92k views

How to select kernel for SVM?

  • 6,959
89 votes
4 answers
36k views

What is an "uninformative prior"? Can we ever have one with truly no information?

  • 21.5k
77 votes
8 answers
116k views

How and why do normalization and feature scaling work?

  • 1,447
58 votes
6 answers
38k views

What are alternatives of Gradient Descent?

  • 815
57 votes
7 answers
25k views

Is there any gold standard for modeling irregularly spaced time series?

  • 1,497
57 votes
5 answers
57k views

What is the difference between GARCH and ARMA?

  • 745
50 votes
6 answers
113k views

What do "endogeneity" and "exogeneity" mean substantively?

  • 501
29 votes
5 answers
3k views

Introductory reading on Copulas

  • 586
27 votes
3 answers
70k views

How to systematically remove collinear variables (pandas columns) in Python? [closed]

  • 557
23 votes
6 answers
2k views

Advanced regression modeling examples

21 votes
1 answer
12k views

Choosing between uninformative beta priors

  • 211
21 votes
5 answers
4k views

Why use extreme value theory?

  • 1,155
21 votes
3 answers
9k views

Crash course in robust mean estimation

  • 567
19 votes
2 answers
7k views

How to do exploratory data analysis to choose appropriate machine learning algorithm

  • 4,329
18 votes
2 answers
28k views

How to add two dependent random variables?

  • 183
16 votes
2 answers
18k views

Are log difference time series models better than growth rates?

  • 161
16 votes
1 answer
99k views

How can I calculate a critical t value using R?

  • 263
15 votes
1 answer
8k views

LogLikelihood Parameter Estimation for Linear Gaussian Kalman Filter

13 votes
2 answers
6k views

PyMC beginner: how to actually sample from the fitted model

  • 363