On this R-data statistics page, you will find information about the DDT data set which pertains to DDT in Kale. The DDT data set is found in the MASS R package. You can load the DDT data set in R by issuing the following command at the console data("DDT"). This will load the data into a variable called DDT. If R says the DDT data set is not found, you can try installing the package by issuing this command install.packages("MASS") 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 DDT R data set. The size of this file is about 79 bytes.
DDT in Kale
A numeric vector of 15 measurements by different laboratories of the pesticide DDT in kale, in ppm (parts per million) using the multiple pesticide residue measurement.
C. E. Finsterwalder (1976) Collaborative study of an extension of the Mills et al method for the determination of pesticide residues in food. J. Off. Anal. Chem. 59, 169–171
R. G. Staudte and S. J. Sheather (1990) Robust Estimation and Testing. Wiley
Dataset imported from https://www.r-project.org.