Test grades in a beginning statistics class

Data for Exercise 1.120

Grades

Format

A data frame with 29 observations on one variable

grades

a numeric vector containing test grades

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples

hist(Grades$grades, main = "", xlab = "Test grades", right = FALSE)


if (FALSE) {
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() 
}