[R] Significance test

[setrofim]

I have a bunch of benchmark measurements that look something like this:

sample.1 	0.0000066660 	0.0000062500 	0.0000058330 	0.0000058330 
0.0000058330
sample.2 	0.0000058330 	0.0000058330 	0.0000058330 	0.0000058330 
0.0000058330
sample.3 	0.0000062500 	0.0000062500 	0.0000070830 	0.0000062500 
0.0000066660

i.e each measurement take on one of a set of values. The set values isn't
fixed, but they seem to go up increments; in this case, it appears to be
about 4.17e-07 (e.g. it would be impossible for a measurement to be
0.0000066440).

What is way to test for significant differences between two samples? 

Sorry if this is a noob question, but I'm kinda new to this. The two tests
I'm aware of are the Student's t and Wilcoxon Rank Sum; neither seems to
apply here. I've tried Googling this, but haven't found anything useful
(maybe I'm not using the right terms...).

Any help would be greatly appreciated.

Regards,
setro





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