Test grades in a beginning statistics class
Data for Exercise 1.120
Grades
A data frame with 29 observations on one variable
a numeric vector containing test grades
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
hist(Grades$grades, main = "", xlab = "Test grades", right = FALSE)
## Not run:
library(ggplot2)
ggplot2::ggplot(data = Grades, aes(x = grades, y = ..density..)) +
geom_histogram(fill = "pink", binwidth = 5, color = "black") +
geom_density(lwd = 2, color = "red") +
theme_bw()
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.