Multiple choice

Which of the following averages is known as 'root-mean square'?

  1. Quadratic Mean

  2. Harmonic Mean

  3. Geometric Mean

  4. Combined Mean
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Quadratic Mean (QM) is calculated as the square root of the mean of squares, which is literally 'root-mean-square'. It's used in physics for RMS voltage and in statistics. Other means have different formulas: Harmonic Mean = n / sum(1/xi), Geometric Mean = (product of xi)^(1/n), Combined Mean is a weighted average of multiple datasets.

Keep practicing — related questions