Can you provide an example of Harmonic Mean?

Hey guys. I am preparing for my mid-term examination. Can you help me on providing an example for my quiz. Quickly please.
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"Harmonic Mean Example: To find the Harmonic Mean of 1,2,3,4,5. Step 1: Calculate the total number of values. N = 5 Step 2: Now find Harmonic Mean using the above formula. N/(1/a1+1/a2+1/a3+1/a4+.......+1/aN) = 5/(1/1+1/2+1/3+1/4+1/5) = 5/(1+0.5+0.33+0.25+0.2) = 5/2.28 So, Harmonic Mean = 2.19 Source: http://in.docsity.com/en-docs/T_Distribution-Statistics-Solved_Quizes_"
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Regarding or maybe pertaining to some sort of harmonic development
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