First, you make a cumulative frequency column, find total frequency N, then locate the class where the cumulative frequency just exceeds N/2—that is your median class. Honestly, the rule is clear, but when I'm tired from practice, my numbers get jumbled, just like when I mix up chords in a new song. My maths teacher says to slow down, and it's the same patience I use to teach my youngest guitar student her first scale.
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