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# One and Two tailed T-Test

Posted on 2014-02-11
Medium Priority
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Hi

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
To-EE.xlsx
0
Question by:amq10
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1 Comment

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Accepted Solution

Steve earned 2000 total points
ID: 39849937
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.
To-EE.xlsx
0

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