What is the correct format for specifying multiple data values in a list input?

The correct answer is that all data values must be separated by a single space when using list input in SAS. In list input, SAS reads data values based on the whitespace present within the input string. This means that the program recognizes each value as long as it is separated by spaces or other forms of whitespace.

When you specify data in this way, it's crucial to ensure that each value is distinct and separated by spaces, as SAS uses these spaces to determine the boundaries of each observation. For example, if you have a line of data such as "10 20 30", SAS will interpret this as three separate values: 10, 20, and 30.

While commas, semicolons, and line breaks are used in different contexts or styles of input in SAS (like CSV files where commas are appropriate), they are not the correct separators for list input specifically. Understanding this detail is essential for effective data entry and processing in SAS programming.