Selection of correct statistical test

Hi all

My research involves testing email interventions to improve survey response rates (sent vs completed email survey). A sample of the output has been attached. The research question is to see if there is a significant difference between completion rates of the six interventions.

I am now confused about the statistical test to use - ANOVA vs chi-square vs Fisher's exact. With ANOVA, one of the variables needs to be continuous, but complete vs not complete is a categorical variable. In which case, I need to choose between chi-square or Fisher's exact. I could use some guidance on this, I am a bit lost!

Thanks in advance!



TS Contributor
From the description you gave, I'd suppose that this is a 6x2 crosstab which can be analysed using Chi².
Provided that you have number of expected (!) cases > 5 in each of the 12 cells of the table.

With kind regards

Thank you Karabiner, that is helpful!

However, some interventions did turn up numbers lower than 5. Is Fisher's exact the method to be used instead?