diff --git a/wally/statistic.py b/wally/statistic.py
index fb05acb..06d525e 100644
--- a/wally/statistic.py
+++ b/wally/statistic.py
@@ -131,7 +131,7 @@
     """chi, etc"""
 
 
-def minimal_measurement_amount(data, max_diff, req_probability):
+def minimal_measurement_count(data, max_diff, req_probability):
     """
     should returns amount of measurements to get results (avg and deviation)
     with error less, that max_diff in at least req_probability% cases