Statistics Practice Test 1

Question : 19 of 37

Marks: +1, -0

What is the harmonic mean of 10, 20, 25, 40 and 50?

Solution:

Harmonic mean

1/H=1/x(1/x_1+1/x_2+1/x_3+1/x_4+1/x_5)

=1/5(1/10+1/20+1/25+1/40+1/50)

=47/1000

⇒H=1000/47=21.3

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