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random variable related issues & queries in StatsXchanger
Best way to seed N independent random number generators from 1 value
python
monte-carlo
random-generation
numpy
Updated February 22, 2019 00:19 AM
4
answers
3612
views
7
votes
Approaches to reduce dimensions (feature selection/extraction) with high dimensional count data before running tree based model
machine-learning
pca
random-forest
dimensionality-reduction
xgboost
Updated February 21, 2019 23:19 PM
0
answers
2
views
0
votes
With lme4, is it possible to weight group-level random effects by similarity?
mixed-model
categorical-data
lme4-nlme
random-effects-model
pooling
Updated February 21, 2019 20:19 PM
0
answers
2
views
0
votes
Wilcoxon Test with Random Effect
mixed-model
random-effects-model
wilcoxon-mann-whitney
Updated February 21, 2019 17:19 PM
0
answers
3
views
0
votes
Model building, how to include information on data point quality?
mixed-model
random-variable
gam
reliability
Updated February 21, 2019 15:19 PM
0
answers
7
views
1
votes
How to specify permutation test (randomization inference) for difference-in-differences?
permutation-test
difference-in-difference
clustered-standard-errors
random-allocation
Updated February 21, 2019 10:19 AM
0
answers
4
views
0
votes
Average time for a random walk on the edges of a cube
probability
random-walk
Updated February 20, 2019 21:19 PM
1
answers
14
views
0
votes
How to find the distance confidence between the sum of random variables and a given target value?
machine-learning
random-variable
stochastic-processes
random-generation
Updated February 20, 2019 21:19 PM
0
answers
2
views
0
votes
Random effect vs. fixed effect with a huge amount of dummies
random-forest
Updated February 20, 2019 20:19 PM
0
answers
5
views
1
votes
Asking opinion about random forests, chi squared and data permutation
chi-squared
random-forest
permutation-test
Updated February 20, 2019 18:19 PM
0
answers
6
views
0
votes
Estimates radically change when including Random Slopes in Multiple Logistic Regression
logistic
mixed-model
repeated-measures
random-effects-model
Updated February 20, 2019 16:19 PM
0
answers
2
views
0
votes
Permutations, shuffling WITHIN but not BETWEEN groups
r
random-generation
permutation-test
Updated February 20, 2019 12:19 PM
1
answers
6
views
0
votes
How can I map a Gaussian vector according to an equation that has a spatial autocorrelation function?
autocorrelation
random-generation
Updated February 20, 2019 11:19 AM
0
answers
3
views
0
votes
Are direct effects between latent variable indicators ever appropriate?
sem
latent-variable
mplus
longitudinal-data-analysis
Updated February 20, 2019 04:19 AM
0
answers
2
views
0
votes
Mixed logit random parameters for non-alternative-specific variables
mixed-model
econometrics
random-effects-model
mlogit
Updated February 19, 2019 21:19 PM
0
answers
2
views
0
votes
A random variable with a step function CDF is discrete?
probability
distributions
random-variable
Updated February 19, 2019 19:19 PM
0
answers
14
views
1
votes
Are the same number of trees required while comparing Random Forest to GBM?
r
random-forest
boosting
Updated February 19, 2019 17:19 PM
0
answers
1
views
0
votes
Are the same number of trees required to compare Random Forest against GBM?
r
machine-learning
random-forest
boosting
Updated February 19, 2019 17:19 PM
1
answers
13
views
0
votes
Central limit theorem doubt
normal-distribution
random-variable
central-limit-theorem
Updated February 19, 2019 17:19 PM
0
answers
10
views
0
votes
Help with PCA Question
self-study
pca
factor-analysis
latent-variable
marginal
Updated February 19, 2019 13:19 PM
0
answers
2
views
0
votes
Is non-central chi-square distribution sub-exponential
random-variable
Updated February 19, 2019 04:19 AM
0
answers
2
views
0
votes
Compare using `lme4` and `nlme` for mixed effects models
r
mixed-model
random-effects-model
fixed-effects-model
Updated February 19, 2019 04:19 AM
0
answers
4
views
0
votes
Random walks-heavy tailed case
stochastic-processes
random-walk
Updated February 18, 2019 11:19 AM
0
answers
6
views
0
votes
'random intercept only', 'random slope only' and 'random intercept and slope' models
random-effects-model
Updated February 17, 2019 14:19 PM
1
answers
229
views
0
votes
Sum of Discrete Random Variables
random-variable
Updated February 17, 2019 13:19 PM
0
answers
2
views
0
votes
What dose it mean for the model to return MTRY = 111?
r
machine-learning
random-forest
caret
Updated February 17, 2019 08:19 AM
0
answers
6
views
0
votes
Distribution of a square of a random variable
distributions
mathematical-statistics
random-variable
Updated February 16, 2019 23:19 PM
0
answers
5
views
1
votes
Changes in significance and effect size (though constant SEs) when controlling for a categorical variable. Correlation test & interpretation?
correlation
anova
interpretation
logit
controlling-for-a-variable
Updated February 16, 2019 19:19 PM
0
answers
2
views
0
votes
Is sketching a method for dimensionality reduction and its relation to random projection
data-transformation
dimensionality-reduction
linear-algebra
high-dimensional
random-projection
Updated February 16, 2019 19:19 PM
0
answers
2
views
0
votes
What is a variable selection and especially a "model-free" variable selection
model
variable
Updated February 16, 2019 13:19 PM
0
answers
5
views
0
votes
add constraints to random forest
regression
machine-learning
neural-networks
clustering
random-forest
Updated February 16, 2019 06:19 AM
0
answers
6
views
0
votes
Coding a BEKK mutlivaraite GARCH model
multivariate-analysis
random-variable
garch
Updated February 15, 2019 11:19 AM
0
answers
3
views
0
votes
Simplex Random Walk Mean
probability
lognormal
metropolis-hastings
random-walk
Updated February 15, 2019 10:19 AM
1
answers
227
views
1
votes
Adding Bad Events from the past to the risk default model to avoid Down/Up sampling techniques
logistic
sampling
random-forest
resampling
credit-scoring
Updated February 14, 2019 16:19 PM
0
answers
2
views
0
votes
New factor levels in testing data set not present in training data in h20.randomforest
r
machine-learning
random-forest
h2o
Updated February 14, 2019 16:19 PM
0
answers
2
views
0
votes
joint PMF in a class of n students
probability
random-variable
joint-distribution
Updated February 14, 2019 06:19 AM
0
answers
2
views
0
votes
PMF and independence with two discrete random variables?
probability
random-variable
expected-value
pdf
joint-distribution
Updated February 14, 2019 06:19 AM
0
answers
7
views
0
votes
How to include covariates in a nested model?
r
regression
multiple-regression
mixed-model
random-effects-model
Updated February 14, 2019 01:19 AM
0
answers
6
views
1
votes
Distribution of the $L^{2}$ norm of a vector of components drawn from Gaussian distributions
probability
distributions
normal-distribution
random-vector
Updated February 13, 2019 21:19 PM
1
answers
14
views
1
votes
How to put list of unordered elements as features into a random forest model
feature-selection
random-forest
Updated February 13, 2019 21:19 PM
0
answers
8
views
0
votes
Can standardized variable be used to generalize sample results to whole population?
correlation
standardization
dependent-variable
Updated February 13, 2019 15:19 PM
0
answers
4
views
0
votes
Interpreting BLUPs or VarCorr estimates in mixed models?
mixed-model
estimation
random-effects-model
blup
Updated February 13, 2019 13:19 PM
0
answers
7
views
1
votes
Conditional expectation function
random-variable
conditional-expectation
Updated February 12, 2019 19:19 PM
0
answers
6
views
0
votes
$L_2$ norm of product of two vectors
machine-learning
standardization
distance
euclidean
random-vector
Updated February 12, 2019 17:19 PM
0
answers
10
views
0
votes
User-Specific Activity Level Along Weeks
machine-learning
clustering
descriptive-statistics
random-walk
Updated February 12, 2019 09:19 AM
0
answers
4
views
0
votes
"Hierarchical" Random forests?
r
machine-learning
random-forest
cart
Updated February 12, 2019 09:19 AM
0
answers
10
views
1
votes
GAMM with multiple and crossed random effects
random-effects-model
gamm4
Updated February 11, 2019 21:19 PM
0
answers
3
views
0
votes
Test for equality of means for vector-valued random process with different variances
hypothesis-testing
random-vector
Updated February 11, 2019 20:19 PM
0
answers
5
views
0
votes
Quantiles of transformed series
forecasting
random-variable
prediction-interval
Updated February 11, 2019 15:19 PM
0
answers
3
views
0
votes
How to fit a longitudinal GAM mixed model (GAMM)
r
mixed-model
random-effects-model
fixed-effects-model
gam
Updated February 11, 2019 13:19 PM
0
answers
6
views
0
votes
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