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Cross Validated
Shawn Hemelstrand's user avatar
Shawn Hemelstrand's user avatar
Shawn Hemelstrand's user avatar
Shawn Hemelstrand
  • Member for 2 years, 6 months
  • Last seen this week
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About

Background

I am a Ph.D candidate at CUHK who studies literacy. My posts about stats are shown below.

GLMMs/GAMMs

GLMM clusters

GLMM reporting

Fixed vs. random effects

How spline coefficients work

GAM basics

GAMM model comparison

Simulation

GLMMs

Reliability

Mediation

Power analysis

Interactions

Algebra of interactions

Plotting interactions

Sig. interactions w/ non-sig. main effects

Regression

Solving $(X^TX)^{-1}X^TY$ using R

Calculating (G)VIF

Overfitting

Regression theory

Suppression

General Topics

Practical significance

Outliers

ANOVA issues

P-value history

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Top posts
View all questions and answers
13
Confused about the notion of overfitting and noisy target function
Sep 3, 2023
13
Can I use different transformations on features to ensure my data follow Gaussian Distribution
Dec 25, 2023
12
Statistical power of my study
Mar 4
12
Understanding spline transformation and regression coefficients
Feb 20
12
Cubic splines in Cox model
May 18
12
Why is the Tukey's IQR not used in the R program?
Feb 4, 2023
12
$p$-value: Fisherian vs. contemporary frequentist definitions
Dec 1, 2023
11
Count predictor and binary outcome
Jun 13
11
Why do random effects require a minimum # of levels?
Oct 28, 2023
11
AIC model selection is keeping a variable with p = 0.47
Apr 3
Top Meta posts
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11
What are the effects of using one's full name on cross validated versus a first name or a pseudonym?
10
What is the proper way to delete your own answer?
9
Distribution of question and answer votes on CV
9
How to vote on partial answers?
9
Are Scihub or Mega/Google Docs articles allowed on CV?
Top network posts
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11
Multiple Regression with Interaction
9
How to handle missing values (NA's) in a column in lmer
5
How to report random effect in the mixed effects model
5
Group by and ungroup according the assignation values in R
5
removing outliers in a vector