I am undergraduate students who is struggling on how to do in-vivo studies with my low budget. Therefore, I ask some help of you just in case you know about what sample size formula that i could use for my in-vivo studies' sample size. In my research, I have 3 kinds of sample: a. Meniscus b. Artificial Meniscus c. PLA-PCL-PMMA-Collagen Meniscus

Thank you in advance.

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    $\begingroup$ Are you asking about a power analysis? There's no way to 'cheat' a power analysis or use a special method to use a smaller sample size. Power analyses simply quantify an otherwise obvious truth: small studies can only reliably detect big effects, and large studies can reliably detect smaller effects than small studies. $\endgroup$ – Bryan Krause May 12 at 16:17

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