I'm trying to explore the relationship between event rate among different strata. I have 3 categorical variables (event type with 4 levels, process with 2 levels, and treatment with 2 levels). I want to see if the event rate is significantly different among the different levels of process, treatment, and event type. I do have total population information with event type, process, and treatment i.e. 125,764 products with event type 1, process 2, and treatment 1 and so on for each group. I was hoping to not grow my data set from 6k rows to 700k by writing rows for non-event cases, but sounds like that is necessary. Was planning to use contingency tables, chi square, and ANOVA to explore these relationships but if you have a suggestion for another way to identify if process and treatment affect event rates I'd appreciate it. Thanks for the help.
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