If I wanted a tool for doing simple statistics (stdev, mean, etc.) on a data set that's around 200 mb. What Clojure tool do you guys recommend?

You can try my fastmath which delegates such things to java backends (Apache Commons Math and Smile)

https://generateme.github.io/fastmath/fastmath.stats.html

Another nice article in the series on MXNet made Simple by @chouffe.caillau: Pretrained Models for image classification - Inception and VGG https://arthurcaillau.com/mxnet-made-simple-pretrained-models/

@dbernal take a look at https://github.com/MastodonC/kixi.stats