exam_grades {openintro}

Exam and course grades for statistics students

Description

Grades on three exams and overall course grade for 233 students during several years for a statistics course at a university.

Usage

exam_grades

Format

A data frame with 233 observations, each representing a student.

semester

Semester when grades were recorded.

sex

Sex of the student as recorded on the university registration system: Man or Woman.

exam1

Exam 1 grade.

exam2

Exam 2 grade.

exam3

Exam 3 grade.

course_grade

Overall course grade.

Examples

library(ggplot2)
library(dplyr)

# Course grade vs. each exam
ggplot(exam_grades, aes(x = exam1, y = course_grade)) +
  geom_point()

ggplot(exam_grades, aes(x = exam2, y = course_grade)) +
  geom_point()

ggplot(exam_grades, aes(x = exam2, y = course_grade)) +
  geom_point()

# Semester averages
exam_grades |>
  group_by(semester) |>
  summarise(across(exam1:course_grade, mean, na.rm = TRUE))