# Is it possible to have too much data? When should I subsample? [duplicate]

Social science PhD student here looking for a little help.

I set out to collect around 300 online surveys for a study, but ended up with over 4,000. At that sample size should I sub-sample my results because it's more likely that significant results will be found because of the sample size?

Thanks.

## marked as duplicate by Nick Stauner, Andy, gung - Reinstate Monica♦, Glen_b -Reinstate Monica, ttnphnsJun 11 '14 at 5:39

This is generally a good thing, so long as it is presented in a helpful way. For example, reporting confidence intervals in sensible units (the intervals will be narrower with a larger sample) rather than $p$ values can help the reader understand whether a reported result is worth worrying about.