I've already received very good data, but there are some tenuous connections that are still too noisy to be certain of

- Are Apple keyboards really slower that non-Apple keyboards?

- Are cheap keyboards really faster than expensive keyboards?

- Are virtually all split keyboards programmable?

More samples would help nail these things down. I'll share the analysis with the community once I'm done, of course. (The analysis pipeline is mostly automated so I can work on analysis in parallel with receiving more submissions.)

This is actually much more commonly useful than the t distribution, in my experience. You can squint at a histogram (or some summary stats), eyeball the stdev, approximate the stderr in your head, and get a pretty good sense of confidence.

I most often find myself doing this for the Bernoulli distribution, where it's also handy to know that the stdev is sqrt(p(1-p)), or "about 1/2 if p is middling, or sqrt(p) when it's small" (and you can flip the polarity to handle p→1).