# Thread: What test to use?

1. ## What test to use?

Hi all,

I am new to statistics.

Now, I am doing a research but I don't know which test to use. Basically, I have four groups with both positive and negative results. I want to know if there is any difference in the percentage for positive result between each groups.

Can anyone help me?

Thanks!!!

Sincerely,
Upupgo

2. ## Re: What test to use?

So your null hypothesis is what exactly?

I am guessing you are thinking about converting negatives to 0s and positives to 1s, then you may be able to compare the expected values, say with chi-sq or Fisher's exact test, if you have small expected cell values. Then if the overall test is significant you can perform pairwise tests to see which groups differ in particular. Can you provide any more context to your research that may help direct our responses?

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