bpo-43147: Remove archaic terminology. (GH-24462)
diff --git a/Doc/library/statistics.rst b/Doc/library/statistics.rst
index 51b5e9c..6b6d315 100644
--- a/Doc/library/statistics.rst
+++ b/Doc/library/statistics.rst
@@ -162,15 +162,14 @@
real-valued numbers. If *weights* is omitted or *None*, then
equal weighting is assumed.
- The harmonic mean, sometimes called the subcontrary mean, is the
- reciprocal of the arithmetic :func:`mean` of the reciprocals of the
- data. For example, the harmonic mean of three values *a*, *b* and *c*
- will be equivalent to ``3/(1/a + 1/b + 1/c)``. If one of the values
- is zero, the result will be zero.
+ The harmonic mean is the reciprocal of the arithmetic :func:`mean` of the
+ reciprocals of the data. For example, the harmonic mean of three values *a*,
+ *b* and *c* will be equivalent to ``3/(1/a + 1/b + 1/c)``. If one of the
+ values is zero, the result will be zero.
The harmonic mean is a type of average, a measure of the central
location of the data. It is often appropriate when averaging
- rates or ratios, for example speeds.
+ ratios or rates, for example speeds.
Suppose a car travels 10 km at 40 km/hr, then another 10 km at 60 km/hr.
What is the average speed?