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One and Two tailed T-Test


I have two data sets. I want to compare between them to see how match are they closer than each other. I am using T-test. But I am really confused what shall I use, one or two tail. Also, shall I use equal variance or unequal' variance?

the two data sets attached to this question
1 Solution
The two data sets you have there are non-normal (they are skewed).
To perform a Two Sample T test you would need to normalise the data first.
Most likely with these skewed data points you would use a Poisson transformation.

Once the data is transformed you should be able to quantify how different these two set are.

I have attached analysis to show how skewed the two data sets are.
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