grades {ic.infer}

Data set grades: Grade point averages by HSR and ACTC

Description

The data set contains first-year grade point averages (GPAs) from 2397 Iowa university first-years who entered the university of Iowa as freshmen in the fall of 1978. The GPAs are separated out by two ordinal variables with 9 categories each, High-School-Ranking percentiles and ACT Classification.

Usage

grades

Format

A data frame with four columns:

HSR

high-school-ranking percentiles

ACTC

ACT classification (ACT is an organization that offers, among other things, college entrance exams in the US; up to 1996, ACT stood for “American College Testing”.)

meanGPA

grade point average for the HSR/ACTC combination

n

sample size for the HSR/ACTC combination

Author(s)

Ulrike Groemping, BHT Berlin

Source

Robertson T, Wright F, Dykstra R (1988). Order-Restricted Inference. Wiley, New York. Table 1.3.1, p.13.

Thanks go to Wiley for granting a complimentary license for embedding the data into the package.