Formulating a Z-test for a real life problem

#1
I have a particular survey data related to a particular job. Out of a population of 90 people in this job, 36 people are in the lowest income group. 19 out of 36 people want to quit that job. I want to formulate a suitable z-test (or any other suitable test) by which I can test whether the income-group of the people and the desire to quit this job is anyway related. Kindly help.
 
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Dason

Ambassador to the humans
#2
Do you have the number of people that want to quit their job that aren't in the lowest income group?