SAS Chapter 1 Basic Concepts

It must be a numeric variable, because the missing value is indicated by a period rather than a blank.

It must be a character variable, because the values contain letters and underscores, which are not valid characters for numeric values.

To store a file permanently in a SAS data library, you assign it a libref other than the default Work. For example, by assigning the libref Profits to a SAS data library, you specify that files within the library are to be stored until you delete them. Therefore, SAS files in the Sashelp and Sasuser libraries are permanent files.

Every SAS file is stored in a SAS library, which is a collection of SAS files, such as SAS data sets and catalogs. In some operating environments, a SAS library is a physical collection of files. In others, the files are only logically related. In the Windows and UNIX environments, a SAS library is typically a group of SAS files in the same folder or directory.

Variable names follow the same rules as SAS data set names. They can be 1 to 32 characters long, must begin with a letter(A-Z, either uppercase or lowercase) or an underscore, and can continue with any combination of numbers, letters, or underscores.

The numeric variable Balance has a default length of 8. Numeric values (no matter how many digits they contain) are stored in 8 bytes of storage unless you specify a different length.

The data set displayed in the image contains:

4 observations: Adams, Geller, Martinez, Noble

2 variables: Name and Balance

Thus, the correct choice based on standard interpretations is missing from the provided options. Each row represents an observation (an individual account with a balance), and each column represents a variable (one for names, and one for balances). There are 4 observations (the individuals named Adams, Geller, Martinez, and Noble) and 2 variables (Name and Balance). If you need the response to match one of your provided choices, please verify the options or provide additional context.

To reference a temporary SAS file in a DATA step or PROC step, you can specify the one-level name of the file (for example, Forecast) or the two-level name using the libref Work (for example, Work.Forecast).

When it encounters a DATA, PROC, or RUN statement, SAS stops reading statements and executes the previous step in the program. The program above contains one DATA step and two PROC steps, for a total of three program steps.

The five statements are: 1) the PROC PRINT statement (two lines long); 2) the VAR statement; 3) the WHERE statement (on the same line as the VAR statement); 4) the LABEL statement; and 5) the RUN statement (on the same line as the LABEL statement).