diff options
Diffstat (limited to 'Lib/statistics.py')
| -rw-r--r-- | Lib/statistics.py | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/Lib/statistics.py b/Lib/statistics.py index 4b054b9..2414869 100644 --- a/Lib/statistics.py +++ b/Lib/statistics.py @@ -367,10 +367,9 @@ def geometric_mean(data): def harmonic_mean(data, weights=None): """Return the harmonic mean of data. - The harmonic mean, sometimes called the subcontrary mean, is the - reciprocal of the arithmetic mean of the reciprocals of the data, - and is often appropriate when averaging quantities which are rates - or ratios, for example speeds. + The harmonic mean is the reciprocal of the arithmetic mean of the + reciprocals of the data. It can be used for averaging ratios or + rates, for example speeds. Suppose a car travels 40 km/hr for 5 km and then speeds-up to 60 km/hr for another 5 km. What is the average speed? |