In the McCollum/Speilman test, the pre- and post-preference measure is different for different product classes.

Name: In the McCollum/Speilman test, the pre- and post-preference measure is different for different product classes.
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The McCollum/Speilman test uses different pre- and post-preference measures for different product classes. This is because different types of products may require different measures to accurately assess consumer preferences.

In the McCollum/Speilman Test, the Pre- and Post-Preference Measure Is