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Diffstat (limited to 'Lib/statistics.py')
| -rw-r--r-- | Lib/statistics.py | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Lib/statistics.py b/Lib/statistics.py index c76a6ca519e..93a46334649 100644 --- a/Lib/statistics.py +++ b/Lib/statistics.py @@ -682,8 +682,10 @@ def _ss(data, c=None): calculated from ``c`` as given. Use the second case with care, as it can lead to garbage results. """ - if c is None: - c = mean(data) + if c is not None: + T, total, count = _sum((x-c)**2 for x in data) + return (T, total) + c = mean(data) T, total, count = _sum((x-c)**2 for x in data) # The following sum should mathematically equal zero, but due to rounding # error may not. |