Statistical tests to compare two columns of values

#1
Hi!

In a study I measured values of samples roughness in a initial stage and after a mechanical test. Now I need to make a statical analysis between these values in order to averiguate if there is a significant diference. However, I'm not sure what test should I use. I used one way anova but I don't know if it's correct to do it with only two columns of values. Can anyone please help me? I send a screenshot with the test that I made.

Best regards,
Amanda
 

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