# How to test if all the levels have the same success/fail probability?

I have a csv data set like this.

Levels, Trial, Fail
1,100,1
2,200,3
3,300,4


How do I test if the probability of fail or success is the same across all the levels?

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You could do Fisher's Exact test on a 3 X 2 contingency table. The null hypothesis is that all 3 levels have the same proportions of success/fail.

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