What should you have done first?

That was a nice hypothesis test you just did to check out whether the rule changes in 1920 changed the rate of no-hitters. But what should you have done with the data first?

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Possible Answers

Performed EDA, perhaps plotting the ECDFs of inter-no-hitter times in the dead ball and live ball eras.
press1
Nothing. The hypothesis test was only a few lines of code.
press2