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qoheleth
  • Member for 8 years, 11 months
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18 votes
3 answers
8k views

From a statistical perspective: Fourier transform vs regression with Fourier basis

13 votes
1 answer
456 views

Explain how `eigen` helps inverting a matrix

9 votes
1 answer
510 views

Why people often optimize the determinant of $(X'\Sigma X)^{-1}$

9 votes
2 answers
5k views

The meaning of conditional test error vs. expected test error in cross-validation

8 votes
2 answers
20k views

Applied statistics vs Mathematical statistics

6 votes
2 answers
740 views

Fitting parametric CDF to ecdf

5 votes
2 answers
126 views

Short term for Probability of Type I error

4 votes
2 answers
9k views

Variance of product of 2 independent random vector

4 votes
1 answer
586 views

Generalized Variance in high dimension setting (p>n)

3 votes
2 answers
1k views

How to estimate high end percentile (e.g. >90%)

3 votes
2 answers
274 views

mixed model: is it primarily used for prediction or explanation or both?

2 votes
2 answers
5k views

Sample size vs response rate, which is more important?

2 votes
0 answers
1k views

How to use one time series to predict another?

2 votes
0 answers
228 views

Understanding biplot for compositional data

2 votes
2 answers
1k views

Residual Sum of Squares from Generalized Least Squares (GLS) always 0?

2 votes
1 answer
194 views

larger sample size or more accurate measurement?

2 votes
1 answer
123 views

Given data $X, Y_1, Y_2,..., Y_p$, how to simulate $Z$ so $cor(Z,X)>0$, but $cor(Z,Y_i)=0$?

1 vote
1 answer
58 views

Is there a parametric regression model that has a convex shape and is bounded between [0,1]? [closed]

1 vote
1 answer
18 views

Sub-sampling a dataset to a different target distribution without replacement - bias correction?

1 vote
3 answers
119 views

How to compare 2 predictive models where one uses predictor with missing values

1 vote
0 answers
62 views

Parameter estimation of LMM with multiplicative measurement error in fixed co-variate - How?

0 votes
1 answer
153 views

Forecast model developed now, but only used later, is it still valid?

0 votes
1 answer
348 views

Spatial prediction on surface: very fine grid vs coarse grid + quick interpolation

0 votes
0 answers
63 views

Why likelihood based geostatistical modelling slower than non likelihood based counterpart

0 votes
0 answers
21 views

why doesn't naive bayes use the empirical distribution for continuous predictor by default?

0 votes
0 answers
11 views

Using the `by` argument in `s()` vs 1 model per factor level - what's the difference in modelling assumption?

0 votes
0 answers
27 views

Expected sample size for sequential t-test

0 votes
1 answer
83 views

C50Rules - how is confidence calculated? (example needed)