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How to motivate the definition of $R^2$ in `sklearn.metrics.r2_score`?

Awarded Oct 26 at 2:42

Dave

57.7k7 gold badges87 silver badges248 bronze badges

Central Moments of Symmetric Distributions

Awarded Oct 25 at 14:40

user18262

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Why is tree correlation a problem when working with bagging?

Awarded Oct 23 at 17:20

etigrenier

1011 silver badge4 bronze badges

Inverse CDF sampling for a mixed distribution

Awarded Oct 23 at 14:36

shadowtalker

12k4 gold badges53 silver badges118 bronze badges

Homoscedasticity Assumption in Linear Regression vs. Concept of Studentized Residuals

Awarded Oct 22 at 20:41

dgks

1014 bronze badges

What are the best books to study Neural Networks from a purely mathematical perspective?

Awarded Oct 22 at 8:55

Ile

2693 silver badges7 bronze badges

Varying dispersion parameter (=dispformula) in glmmTMB in R to account for heteroscedasticity that originates from one predictor

Awarded Oct 20 at 10:58

eab

1014 bronze badges

Why can we ignore missing data if it's missing at random?

Awarded Oct 19 at 22:26

Rainroad

2652 silver badges8 bronze badges

Fisher exact test on paired data

Awarded Oct 19 at 17:55

Gert

2132 silver badges8 bronze badges

What is the relationship between Metropolis Hastings and Simulated Annealing?

Awarded Oct 19 at 13:48

Euler_Salter

2,0741 gold badge20 silver badges41 bronze badges

What is a factorized Gaussian distribution?

Awarded Oct 19 at 13:10

Code Pope

97910 silver badges20 bronze badges

Multilevel multivariate meta-regression

Awarded Oct 19 at 2:09

Stefan

1751 silver badge8 bronze badges

PLS (partial least squares) weights, loadings, and scores interpretations

Awarded Oct 18 at 15:56

Heavy Breathing

5412 gold badges6 silver badges9 bronze badges

Calculate Earth Mover's Distance for two grayscale images

Awarded Oct 18 at 15:20

LVDW

1652 silver badges8 bronze badges

Is there a standard measure of fit to validate Exploratory factor analysis?

Awarded Oct 17 at 9:20

Ishant Sharma

1031 silver badge6 bronze badges

Difference between random effetcs and dummy coding of a categorical variable

Awarded Oct 16 at 18:15

Benoit Sanchez

7,96723 silver badges45 bronze badges

Regression Using Continuous Variable with Nulls

Awarded Oct 16 at 14:47

Ben Saunders

2232 silver badges7 bronze badges

Why go through the trouble of expectation maximization and not use gradient descent?

Awarded Oct 16 at 14:47

figs_and_nuts

2,3852 gold badges23 silver badges36 bronze badges

Effect size in GLMM

Awarded Oct 16 at 8:03

mto23

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Why is N/k the effective number of parameters in k-NN?

Awarded Oct 15 at 9:08

foo

1031 silver badge6 bronze badges

Besides the Literary Digest poll of 1936, what are some famous examples of biased samples that led to erroneous conclusions?

Awarded Oct 15 at 1:31

Daniela

1131 silver badge14 bronze badges

How to explain 1.5 children?

Awarded Oct 13 at 10:37

RLDavis

3132 silver badges5 bronze badges

Expected value and variance of sample correlation

Awarded Oct 13 at 4:46

Tommy L

1,5431 gold badge12 silver badges20 bronze badges

When a CFA model has a "covariance matrix was not positive definite" problem, is it due to the dataset or the model?

Awarded Oct 11 at 16:43

Edo Jaya

1871 gold badge1 silver badge11 bronze badges

How would a Bayesian define a fair coin?

Awarded Oct 11 at 11:04

Sam

5112 silver badges15 bronze badges

How to get confidence interval for the population variance?

Awarded Oct 10 at 10:07

travelingbones

3711 silver badge12 bronze badges

Justification for reporting non-significant effect sizes

Awarded Oct 10 at 9:56

Michael MacAskill

6204 silver badges9 bronze badges

What will be the correct answer, if we modify the "Best statistics question ever"?

Awarded Oct 9 at 22:17

Nick

1091 silver badge4 bronze badges

What is the difference between independent variable and a feature?

Awarded Oct 9 at 14:48

Kunjan Kshetri

3472 gold badges3 silver badges10 bronze badges

Statistical fallacy from a Japanese light novel

Awarded Oct 9 at 6:51

夏目漱石

2331 silver badge4 bronze badges

Why KNN and SVM with a gaussian are non-parametric models?

Awarded Oct 8 at 7:41

Hanamichi

6532 gold badges7 silver badges9 bronze badges

What is the interpretation of eps parameter in DBSCAN clustering?

Awarded Oct 6 at 14:31

GeorgeOfTheRF

5,55317 gold badges46 silver badges56 bronze badges

Truncated Von Mises-Fisher distribution

Awarded Oct 5 at 20:57

sachinruk

1,3531 gold badge11 silver badges24 bronze badges

Is it ok to run post hoc comparisons if ANOVA is nearly significant?

Awarded Oct 5 at 19:11

FastBallooningHead

4812 silver badges8 bronze badges

Empirical logit transformation on percentage data

Awarded Oct 5 at 19:05

user3237820

5605 silver badges13 bronze badges

How Many Moments Uniquely Define a Distribution with Finite Support?

Awarded Oct 4 at 22:32

housed_off_space

2281 silver badge7 bronze badges

Distribution of final piece in stick breaking process $x_{k+1} = (x_{k} -1) \cdot u_{k+1}$

Awarded Oct 4 at 13:18

Sextus Empiricus

71.5k3 gold badges93 silver badges243 bronze badges

When generating samples using variational autoencoder, we decode samples from $N(0,1)$ instead of $\mu + \sigma N(0,1)$

Awarded Oct 4 at 8:25

Edward B.

1031 silver badge4 bronze badges

Why is optimisation solved with gradient descent rather than with an analytical solution? [duplicate]

Awarded Oct 4 at 6:27

Karnivaurus

6,80911 gold badges42 silver badges57 bronze badges

How to know if the model is underfitting because the data is hard to model, or just the model is too simplistic?

Awarded Oct 2 at 15:08

striker22

3235 bronze badges

Using post-stratification weights in R survey package

Awarded Oct 2 at 8:37

FabF

1411 silver badge9 bronze badges

Factoring of conditional probability

Awarded Oct 2 at 0:58

B_Miner

8,17022 gold badges91 silver badges151 bronze badges

Writing PCA as a special kind of auto-encoder

Awarded Oct 1 at 14:30

bashfuloctopus

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Definition of "unpredictable"

Awarded Oct 1 at 8:06

Richard Hardy

64.5k13 gold badges120 silver badges251 bronze badges

Convincing Causal Analysis using a DAG and Backdoor Path Criterion

Awarded Oct 1 at 0:50

ColorStatistics

4,2761 gold badge14 silver badges46 bronze badges

Theory behind Targeted Maximum Likelihood Estimation (TMLE)

Awarded Sep 30 at 7:49

RobertF

5,5327 gold badges35 silver badges65 bronze badges

advantages and disadvantages of IPTW vs propensity score matching?

Awarded Sep 28 at 23:19

ziweiguan

4992 gold badges7 silver badges15 bronze badges

Propensity Score Matching – How do the mechanics lead to a different result than unmatched?

Awarded Sep 28 at 16:56

Yakkanomica

4832 silver badges15 bronze badges

Compound Poisson Distribution with sum of exponential random variables

Awarded Sep 27 at 11:31

Suiz96

1111 silver badge3 bronze badges

To a Bayesian, does a trick coin with two heads have 50% chance of flipping heads if they don't know that it has two heads?

Awarded Sep 26 at 14:26

setblack7

1231 silver badge4 bronze badges

Friedman's test is very significant, but its post hoc comparisons (SPSS) are not significant

Awarded Sep 24 at 3:32

Niksr

2771 gold badge3 silver badges10 bronze badges

Variance calculation RELU function (deep learning)

Awarded Sep 23 at 15:27

Krn

2252 silver badges6 bronze badges

Quick test of quality of an econometrics textbook

Awarded Sep 23 at 5:02

Richard Hardy

64.5k13 gold badges120 silver badges251 bronze badges

Should we always do CV?

Awarded Sep 22 at 0:05

H. Shindoh

2133 silver badges9 bronze badges

"row" and "column" are the names of axes of 2d array, is there a similar naming for a 3d array?

Awarded Sep 21 at 18:42

whnlp

2271 silver badge7 bronze badges

Dealing with good performance on training and validation data, but very bad performance on testing data

Awarded Sep 21 at 16:18

user10

2271 gold badge2 silver badges6 bronze badges

Calculating I-squared (in meta-analysis, given tau-squared)

Awarded Sep 21 at 12:52

Jeremy Miles

16.5k6 gold badges37 silver badges73 bronze badges

Can a sample be too large for ANOVA or a t-test?

Awarded Sep 20 at 19:02

user24232

1031 silver badge5 bronze badges

Proportion of explained variance in PCA and LDA

Awarded Sep 20 at 13:27

wrek

1111 gold badge1 silver badge4 bronze badges

priors for Gamma shape and scale parameters

Awarded Sep 20 at 0:16

spore234

1,7211 gold badge22 silver badges35 bronze badges

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