Zajichek Stats

A blog on statistical practice, programming, history, philosophy, and data science.

How to reconcile the regression equation from spline terms

Regression

Using the {rms::rcs} function

Can you have a model without data?

Bayesian Statistics

Yes, by being a Bayesian.

You should have a data science blog

Deployment

Learning

Software Development

Easy and free are only a couple benefits.

Low cost ways to build and deploy analytical web apps

Web applications

Deployment

An overview of some server options

A prediction system for managing the hospital readmission risk pool

Healthcare

Modeling

Prediction

Proposed framework

How do you assess the proportional-odds assumption? Directly.

Regression

A simple visual check.

A simple example why statistical significance is insufficient for action

Statistical Significance

Decision Making

It ignores the basic question: “How much?”

5 ways to help ensure success of a statistical project

Project Management

How can we increase the likelihood that things will go as expected?

Quantum entanglement from a statistician’s perspective

Quantum

Probability

I’m a total beginner, but this stuff is interesting

On the Creation of Classical Statistics

History

Philosophy

Fisher was in fact, a genius

Statistical significance is…insignificant

History

Philosophy

Research

“A cheap way to get marketable results” -William Kruskal

The overlap weight in survival analysis

Causal Inference

Survival Analysis

Propensity Scores

Weighting

A simulation review

Removing higher-order aggregation text in {reactable}

Tables

Javascript

Often when I’m building a reactable I have potentially many aggregation levels but only want to display data in a lower subset of those. Here is a quick way to eliminate…

Nesting with {tidyr}

Data Wrangling

I really love the elegance of the nest functionality with the tidyr package. It really allows you to abstract the meaning of a data frame to not just contain rectangular…

Some Takeaways from Effective Data Storytelling

Communication

I’ve been reading through the book Effective Data Storytelling: How to drive change with data, narrative, and visuals by Brent Dykes and just wanted to document some…

The Evasive Spline

Estimation

Modeling

Basis Functions & Splines

(Re)deriving a Bernoulli MLE

Estimation

Trying to remember calculus

Statistical Rethinking 2023 Class Notes

Bayesian Statistics

Causal Inference

This document is intended to be a repository for my (raw, unedited) notes, interpretations, examples, and summaries from the Statistical Rethinking 2023 course (which…

A couple useful JavaScript aggregation and formatting functions for {reactable}

Healthcare

Tables

Javascript

Embedding tables into your analytical HTML document

Building a filterable map with {leaflet} and {crosstalk} for hospital readmissions

Healthcare

Maps

Javascript

For runtime-free analytical content delivery

Exploring COM Poisson regression

Regression

A method for underdispersed count data

A look at collider bias

Causal Inference

There has been a lot of buzz around “causal inference” and given how fundamental the name seems to statistics, I picked up The Book of Why: The New Science of Cause and Effect…

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