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Comparing means of unequal distributions

Nov 2, 2016 4:46 PM
(1598 views)

Hi,

I have measurements from two groups with a large variance (for which I have already corrected by a Log10 transformation) and unequal distributions (Bartlett p=0.009).

What is the proper way to compare the means of these two groups?

The data can also be paired. Is it correct to use the paired t-test on the Log10 data?

Thanks

4 REPLIES 4

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Re: Comparing means of unequal distributions

It is proper to do a paired t test on the transformed data.

Jim

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Re: Comparing means of unequal distributions

Thanks a lot.

And the groups in general?

Also a t test on Log-transformed data?

And the groups in general?

Also a t test on Log-transformed data?

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Re: Comparing means of unequal distributions

You will want to used the log transformed data since that transformation results in a normal distribution. And you would want to use a paired t-test if the data warrants it, to increase the power of the test.

Jim

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Re: Comparing means of unequal distributions

Thanks a lot, Jim