error correction

practica/math/statistic/README.md

@@ -4,12 +4,17 @@ Here you can find statistic tasks, which can be usefull in econometric calculati
 
 ## Variance
 
-- [Arithmetic mean](Arithmetic_mean.py) - the arithmetic mean of a given set of values formula
+
+
+## Statistic tasks
+- [Arithmetic mean](Statistic_tasks/tArithmetic_mean.py) - the arithmetic mean of a given set of values formula
 - [Greatest common divisor](Greatest_common_divisor.py) - calculate the GSD
 - [Least common multiple](Least_common_multiple.py) - calculate the LCM
 - [Median](median.py) - the median formula
 - [Multiplication tables](multiplication_tables.py) - multiplication tables in the form of a table of 2 horizontal and 2 vertical values
 - [Number square root](Number_square_root.py) -  the square root of the number formula
 - [Range](range.py) - the formula of mathematical range
-
+- [Mean of numbers on a segment](mean_of_nm_on_segment.py) - 
+- [Standard deviation](Standard_deviation.py) - calculate the standard deviation of list
+- [Sum](sum.py)  
 

practica/math/statistic/Statistic tasks/README.md

@@ -1,6 +0,0 @@
-## Statistic tasks
-- [Mean of numbers on a segment](mean_of_nm_on_segment.py) - 
-- [Standard deviation](Standard_deviation.py) - calculate the standard deviation of list
-- [Sum](sum.py) - 
-
-