I am testing categorical variables for significant relationships, 5 age groups and 3 answer options (yes/no/don't know). Is there a test which will specifically tell me if e.g. age group 1 is significantly more likely to answer 'yes' than age group 2?
I have been using chi-squared but this only tells me if there is a difference in the pattern and not specifically where the difference comes from.
Is looking at indexed values and percentages in the chi-squared table really the only way to find out where the difference came from? I find this method could be fairly inaccurate if a variable has many categories?