Incorrect

After calculating the differences between each group, it is necessary to express them. Expressing them with letters is a very convenient method. First, arrange each group in descending order of average, with the largest average marked as "a". Continue in order, and those with the largest difference that are not significant are marked as "a" until a significant difference appears. Marked with "b". Starting from this "b" and going forward, add a mark "b" to everything that is not significantly different from it, until there is a significant difference, stop; starting from this "ab" and going forward, add a mark "b" to everything that is not significantly different from it. One is marked "b" until a significant difference occurs, marked "c". Just repeat this cycle until everything is marked. There would be no ab without b.

The criterion for judging the distinctiveness of a trademark is that the concept or meaning of the mark cannot be directly related to the marked object, that is, the goods or services, or has only a small or indirect correlation.