Attribute Difference Tests: How Does Attribute X Differ between Samples?

Attribute difference tests measure a single attribute, e.g., sweetness, comparing one

sample with one or several others. The lack of a difference between samples with

regard to one attribute does not imply that no overall difference exists. Attribute difference

tests involving two samples (Section 7.2) are simple regarding test design and statistical

treatment; the main difficulty is that of determining whether test situations are one-sided

or two-sided (see next page and Example 7.1 and Example 7.2).