At the risk of labouring the point (I apologise if I am), the logic of hypothesis testing is that you can only test for differences not equivalence. You cannot compare two things in order to determine if they are the same - this is always the null hypothesis, which is not testable. Also, to reject the H1, or experimental hypothesis, is to not 'prove' the null hypothesis (which can never be proven). It means that you need a new hypothesis.
Cheers,
Candice
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