On this Picostat.com statistics page, you will find information about the Formaldehyde data set which pertains to Determination of Formaldehyde. The Formaldehyde data set is found in the datasets R package. You can load the Formaldehyde data set in R by issuing the following command at the console data("Formaldehyde"). This will load the data into a variable called Formaldehyde. If R says the Formaldehyde data set is not found, you can try installing the package by issuing this command install.packages("datasets") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the Formaldehyde R data set. The size of this file is about 76 bytes.
Determination of Formaldehyde
These data are from a chemical experiment to prepare a standard curve
for the determination of formaldehyde by the addition of chromatropic
acid and concentrated sulphuric acid and the reading of the resulting
purple color on a spectrophotometer.
A data frame with 6 observations on 2 variables.
[,1] || carb|| numeric || Carbohydrate (ml)
[,2] || optden || numeric || Optical Density
Bennett, N. A. and N. L. Franklin (1954)
Statistical Analysis in Chemistry and the Chemical Industry.
New York: Wiley.
McNeil, D. R. (1977) Interactive Data Analysis.
New York: Wiley.
plot(optden ~ carb, data = Formaldehyde,
xlab = "Carbohydrate (ml)", ylab = "Optical Density",
main = "Formaldehyde data", col = 4, las = 1)
abline(fm1 <- lm(optden ~ carb, data = Formaldehyde))
opar <- par(mfrow = c(2, 2), oma = c(0, 0, 1.1, 0))
Dataset imported from https://www.r-project.org.