Table 2.

Number of rows, columns and plates (where at least one row or column contains systematic error) of McMaster Test assay in which the t-test reported the presence of systematic error, depending on the α parameter

α	Plates	Rows	Rows %	Columns	Columns %
0.01	159	76	0.76%	94	0.75%
0.05	814	575	5.76%	606	4.86%
0.1	1121	1148	11.50%	1296	10.38%
0.2	1241	2242	22.46%	2583	20.70%

Only 8 rows and 10 columns of McMaster Test assay were examined because the first and twelfth columns of the (8 by 12) plates were used for controls.