What is the condition for numeric values in standard format?

The condition that numeric values in standard format cannot include dollar signs is rooted in the definition of what constitutes numeric data in programming and data analysis. In standard numeric formatting, values are typically represented solely as digits and may include mathematical symbols such as decimals or negative signs, but they should not have any non-numeric characters like dollar signs or other currency symbols that can indicate format but do not represent the inherent value of the number.

The absence of dollar signs allows for clean numerical calculations and facilitates operations usual in data analysis, ensuring that the values are treated as numeric types in programming environments like SAS. This allows mathematical functions and statistical analyses to be performed without additional parsing or conversion needed for currency formats.

The other options do not accurately reflect the standard numeric format. Numeric values do not necessarily need to include commas, as they are primarily used for readability in larger numbers but are not a requirement. Spaces are generally not allowed in numeric values as they disrupt the interpretation of the number as a single entity. Lastly, there is no intrinsic requirement for numeric values to be greater than zero; numeric formats can include both positive and negative values, as well as zero.