A Mnemonic for Remembering Type I vs Type II Errors

Step away from inferential statistics for a while and the interpretation of Type I and Type II errors in hypothesis testing could slip away.

How about a mnemonic to help solidify the concepts?

To frame the mnemonic, consider the following scenario:

A man has been charged with murder and you’re on the jury. Witnesses have brought forth testimony. Evidence has been submitted. You’ve just handed in your verdict.

Now for the mnemonic:

If he’s going to jail but shouldn’t be
you’ve committed an error
of the 1st degree (Type I)

on the other hand

If you set him free
when he’sactually guilty
your evidence was too few
and you’ve committed a Type II.

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