Table 1.

Estimation of distribution normality

Dilution set (wells)	Skew	Kurtosis	Total data points
A1–6	1.064	7.357	237
B1–6	0.615	4.085	237
C1–6	0.221	3.556	244
D1–6	1.051	6.305	241
E1–6	0.473	5.524	240
F1–6	1.88	6.769	222
G1–6	2.012	10.079	220
H1–6	1.379	12.177	223
A7–12	−0.337	2.16	220
B7–12	0.098	4.508	217
C7–12	0.215	2.838	259
D7–12	0.739	2.514	241
E7–12	0.563	3.555	223
F7–12	−0.034	3.843	206
G7–12	1.429	7.023	198
H7–12	−0.148	5.319	240

Pairwise E values of 16 dilution sets were analyzed for skewness and kurtosis. Skewness values that deviate from 0 indicate asymmetry of the distribution, making it a non-normal distribution. Positive kurtosis values also imply deviation from normal distribution and indicate that the distribution is sharp (more values are close to mathematical expectation, and precision is higher than would be expected in the case of normal distribution). The right column contains the numbers of individual pairwise E determinations for each dilution set that were taken for this analysis