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March 28th, 2018, 06:42 PM  #1 
Member Joined: May 2015 From: USA Posts: 34 Thanks: 1  2 Population Proportions ZTest
I measured 2 population proportions, one from Q1 2017 and another from Q1 2018, to be 50% and 45%, respectively. These are not proportions derived from samples but the entire population at the time. Obviously, there’s a difference between the 2 proportions. Is it still necessary to subject them to a 2 proportions Ztest to test if the difference is significant or due to chance?


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population, proportions, ztest 
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