Diesel fuel prices in 1999-2000 in nine regions of the country

Source: R/BSDA-package.R

Data for Exercise 2.8

Diesel

Format

A data frame/tibble with 650 observations on three variables

date

date when price was recorded

pricepergallon

price per gallon (in dollars)

location

a factor with levels California, CentralAtlantic, Coast, EastCoast, Gulf, LowerAtlantic, NatAvg, NorthEast, Rocky, and WesternMountain

Source

Energy Information Administration, National Enerfy Information Center: 1000 Independence Ave., SW, Washington, D.C., 20585.

References

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

Examples


par(las = 2)
boxplot(pricepergallon ~ location, data = Diesel)

boxplot(pricepergallon ~ location, 
       data = droplevels(Diesel[Diesel$location == "EastCoast" | 
       Diesel$location == "Gulf" | Diesel$location == "NatAvg" | 
       Diesel$location == "Rocky" | Diesel$location == "California", ]), 
       col = "pink", main = "Exercise 2.8")

par(las = 1) 
if (FALSE) {
library(ggplot2)
ggplot2::ggplot(data = Diesel, aes(x = date, y = pricepergallon, 
           color = location)) + 
           geom_point() + 
           geom_smooth(se = FALSE) + 
           theme_bw() + 
           labs(y = "Price per Gallon (in dollars)")
}