diff --git a/stdlib/statistics.pyi b/stdlib/statistics.pyi
index 540ccfcaa..e6c3d8f35 100644
--- a/stdlib/statistics.pyi
+++ b/stdlib/statistics.pyi
@@ -94,7 +94,13 @@ else:
 def median(data: Iterable[_NumberT]) -> _NumberT: ...
 def median_low(data: Iterable[SupportsRichComparisonT]) -> SupportsRichComparisonT: ...
 def median_high(data: Iterable[SupportsRichComparisonT]) -> SupportsRichComparisonT: ...
-def median_grouped(data: Iterable[_NumberT], interval: _NumberT = ...) -> _NumberT: ...
+
+if sys.version_info >= (3, 11):
+    def median_grouped(data: Iterable[SupportsFloat], interval: SupportsFloat = ...) -> float: ...
+
+else:
+    def median_grouped(data: Iterable[_NumberT], interval: _NumberT = ...) -> _NumberT | float: ...
+
 def mode(data: Iterable[_HashableT]) -> _HashableT: ...
 
 if sys.version_info >= (3, 8):