No. of respondents in each group A-120, B-120, C-30.

Each group has an index about a topic. There are 14 such topics.

In short, 14 indices of A, B and C.

What is the statistical test to find if there is significant difference between the indices of the 3 groups?

I did one way ANOVA and it said no significant difference.

I got confused :shakehead because the maximum value of the index being 100 on any topic, one topic gave indices like this 60, 86,88 by A, B & C respectively.

Isn't that a big difference?

Also what test to do to find the concordance between each group?

Please help and guide. It is as part of a research.