Test Statistic Calculator Chi Square. And the groups have different numbers. But is that just random chance.
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χ 2 i j 1 n o i j e i j 2 e i j. Chi square calculator for 2x2. Or have you found something significant.
The chi square test gives us a p value to help us decide.
The chi square test of independence is right tailed. The formula for a chi square statistic is. So for example if you have collected data on smoking habits and want to find out whether smoking is related to gender you could have male and female as the two groups and smoking and non smoking as the two categories. And the groups have different numbers.
