python a_b_test.py -f <file.csv> -t 2s -c1 <column1> -c2 <column1> -a <alpha>
'-f', '--file' -> File path of the dataset (required)
'-t', '--test' -> Type of test to perform (required): chi2, 1s, 2s
'-c1', '--col1' -> Name of column 1 (required)
'-c2', '--col2' -> Name of column 2 (optional for 1 sample test)
'-m', '--mean' -> Mean value (optional for 1 sample test)
'-a', '--alpha' -> Significance level (default: 0.05)
python a_b_test.py -f <file.csv> -t 1s -c1 <column1> -a <alpha> -m <mean>