t test for two samples with different sizes

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joseph Frank
joseph Frank 2011-7-9
评论： the cyclist 2024-8-28
Hi,
Which function should i use if I want to test whether two samples with different sizes have different means? I see many ttest functions in matlab

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the cyclist
the cyclist 2011-7-10
>> ttest2(x,y)
where "x" and "y" are the vectors of your two samples.
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Jules
Jules 2024-8-27
if you see this, i am trying t do a t-test with two sets of unequal size. i do not care about the size difference, is there anyway to bypass this - other than doing it manually ?
the cyclist
the cyclist 2024-8-28
Yes, still dedicated.
I'm unsure of what you mean, specifically I am not sure what you are trying to "bypass".
When you say "size", I assume you referring to the number of observations in each sample. ttest2 doesn't require equal-sized samples. (If you input two samples into ttest, it will do a pairwise test, and will require equal-sized samples.)
What specifically are you testing for, between the two samples? Whether or not they have different means? Or something else?
A careful reading of the documentation should answer your question.

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