LSAT 데이터

1 개요

LSAT 데이터

df <- read.csv("https://github.com/jmnote/zdata/raw/master/github.com/cran/ltm/data/LSAT.csv")

library(ltm)
model <- ltm(df ~ z1)
coef(model)

library(irtplay)
model <- est_irt(data=df, model="2PLM")
coef(model)

2 같이 보기

• LSAT

3 참고

• Thissen, D. (1982). Marginal maximum likelihood estimation for the one-parameter logistic model. Psychometrika, 47, 175-186.