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Mean, Median and Mode

Three ways to describe the "middle" of a set of numbers.

  • Mean: add them up and divide by how many there are.
  • Median: the middle value once sorted (the average of the two middle values if there is an even count).
  • Mode: the value that appears most often.

One extreme value drags the mean but barely moves the median, so the median is a better "typical" value for skewed data such as incomes.

Examplepython
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Quick check

Which is least affected by one extremely large value?

Your turn: write the code

Print the median of the scores.

Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.

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