I have a 2x4 table with nominal data (the columns are simply YES/NO, the rows are four categories)
Category A: 7, 13 Category B: 15, 5 Category C: 15, 5 Category D: 19, 1
I am hoping to test the significance of a couple of the categories to each other (2x2), but also to assess the significance of the whole table (2x4, although I am not really sure how to interpret the meaning of the significance that may result here).
I understand that as my sample sizes are small (as you can see, Category D features "1" under NO, and each category has only 20 people) that I should be using Fisher's Exact Test. Is this correct?
Can Fisher's also be used in a 2x4? And what does it mean if this result is significant?