In this book, we'll most often work with data that has already been entered and stored in a file, much like you would type and store a paper in a word-processing file or data in a spreadsheet file. In Chapter 2, you'll see how to create a data table on your own.
We'll start with the Michelson data mentioned earlier.
Click File → Open.
Navigate your way to the folder of data tables that accompany this book.
 All of the data tables used in this book are available from support.sas.com/authors. If you are enrolled in a college or university course, your instructor may have posted the files in a special directory. Check with your instructor.
Select the file called Michelson 1879 and click Open.
The data table appears in Figure ...