feat: statistics chapter done

src/main.py

@@ -3,11 +3,12 @@ import unittest
 
 from modules.essential_math.examples.statistics_example import (
 	normal_distribution_example,
+	normal_distribution_exercise,
+	t_distribution_example,
 	basic_statistic_concepts_example,
 	z_scores_example,
+	final_exercises
 )
 
 if __name__=="__main__":
-	# basic_statistic_concepts_example()
-	# normal_distribution_example()
-	# z_scores_example()
+	final_exercises()