Table 1. Left: notation used in this paper for the 2 × 2 contingency table; Right: an example data of the 2 × 2 contingency table, which are also presented in Fig. 2 and Example 2 in Fig. 5.

	Success	Failure	Total		Success	Failure	Total
Treatment 1	y 1	n 1−y 1	n 1	Treatment 1	1	9	10
Treatment 2	y 2	n 2−y 2	n 2	Treatment 2	5	5	10
Total	y +	n +−y +	n +	Total	6	14	20