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decision_boundary

Non-linear decision boundary (for classification) with logistic regression and natural cubic splines.

gam_with_monotonic_constraints

How to approximate a shape constrained additive model (scam) with linear basis functions. Output is an Excel-friendly regression equation.

k_fold_cv

A study to examine the trade-offs associated with increasing the K in K-Fold cross-validation. Sometimes referred to as V-fold cross-validation.

linear_filters_in_r

How to calculate moving averages in R

linreg_t-test

model_calibration

monty_hall_problem_in_r

northwestern_msia_2022

Measuring the consequences of serial correlation and non-stationary variables through simulation

p-values

simulation to show how p-values work

power_analysis_3_funcs

Compare the power of 3 confidence interval functions for proportions

prob_of_recession

python-sandbox

sp500

Had you invested $10,000 on 1929-07-01, your portfolio would have been worth about $3,000 after 12.5 years. In stark contrast, if you invested $10,000 on 2007-11-01, your portfolio would have been worth about $19,000 after 12.5 years.

spurious_regression

how to detect spurious regression using time-series cross-validation

survival_data

Simulate data that is ideal for Cox Model. Fit Cox PH Model, OLS, OLS with log transform, and Poisson Model. Compare test set performance for expected time to event.

verybriefintro_predictive_analytics