Asymptotic expansions of the distributions of likelihood ratio and Lagrange multiplier test statistics for nonlinear restrictions on regression coefficients are derived under the null hypothesis.

A semi-parametric generalization of the proportional hazards regression model is defined, whereby the hazard functions can cross for different values of the covariates. In the two-sample comparison, ...

Height and Weight Analysis This project analyzes the relationship between height and weight using a provided dataset. It includes steps for data loading, hypothesis testing, normality checking, and ...

Jacob Cohen (1923 - 1998) was a pioneer of psychological statistics. He taught us about effect sizes, power analysis, and multivariate regression, among many other things. I have always admired his ...