Statistical sampling tests I have used for research included the paired t-test and one way ANOVA. Typically, for something to be taken as statistically significant, a power of 95% or better is needed. Whereas in industry you will be checking for defects in the product, I was looking to see if my experiment showed any variable dependence. In the lab, there was not much emphasis on how many trials we needed because we had a limited number of trials available to run.