Harmonic Mean

Problem

Return the harmonic mean n / sum(1/x). Return 0.0 if data is empty, contains a zero, or the reciprocal sum is zero.

Hint

Sum the reciprocals first, then divide the count by that sum.

case 1

in: [[1,2,4]]

expected: 1.7142857142857142

case 2

in: [[2,6]]

expected: 3

case 3

in: [[10]]

expected: 10

case 4

in: [[1,0,3]]

expected: 0

case 5

in: [[4,4,4]]

expected: 4

Starter codePython

def harmonic_mean(data):
    # Your code here
    pass

5 test cases · run your code against them in the editor