I have a very basic question. I hope to get some help from here. What would be the right tool to use for small sample sizes.

For example:

A material is tested for yield stress. 3 samples tested got the following results

Sample 1: 120 MPa

Sample 2: 132 MPa

Sample 3: 125 MPa

How can I use this data to confidently arrive at a yield stress for the material.

Thanks

J