Statistical power and large sample sizes
Large sample sizes increase statistical power and increase the flexibility of the effect size
Large sample sizes provide enough statistical power to find treatment effects in between-subjects, within-subjects, and multivariate designs, as well as when outcomes are measured at continuous, ordinal, or categorical levels.
From a data analysis standpoint, there are many things one can do with data. However, remember that experimentwise error rates (Type I errors) increase with more analyses.
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