The SP/SA factor is ______ with a value of _______.

The SP/SA factor is ______ with a value of _______.

• A. Unitless
• B. 0 to 1
• C. Unitless; 0 to 1
• D. 1 or greater

Answer: (B)

The main idea is that SP/SA is a ratio that expresses a proportion on a normalized scale. It compares SP to SA on the same scale, so the resulting value represents a fraction of the maximum possible value. Because you’re measuring how much SP is relative to SA, the value cannot exceed the whole (1) and cannot be negative. That’s why the correct description is a range from 0 to 1. A value of 1 means SP equals SA (full proportion), while 0 means SP is none of SA.

The main idea is that SP/SA is a ratio that expresses a proportion on a normalized scale. It compares SP to SA on the same scale, so the resulting value represents a fraction of the maximum possible value. Because you’re measuring how much SP is relative to SA, the value cannot exceed the whole (1) and cannot be negative. That’s why the correct description is a range from 0 to 1. A value of 1 means SP equals SA (full proportion), while 0 means SP is none of SA.