Without going into domain specific information, I have a data set in which I'm testing the rate of occurrences of an event like so:
# of trials: 378
# of occurrences: 109
# of occurrences in case 1: 12
# of occurrences in case 2: 45
# of occurrences in case 3: 51
I want to find out if there is a significant difference in the occurrence of the event between those three test cases. I expect that case 1 will be significantly different, while case 2 and 3 will show no significant difference in their occurrence.
I think I need a chi square, but I can't for the life of me figure out how to set it up because I only have one dimension.
Thank you in advance.