. 2018 Feb 1;8(10):5509–5522. doi: 10.1039/c7ra12762f

Statistical comparison of proposed method with reference methods.

Samples	F – test results^a
Samples	(s₁²/s₂²)¹⁵	(s₁²/s₃²)²⁶	(s₁²/s₄²)³¹	(s₁²/s₅²)³³	(s₁²/s₆²)²⁸
Water	0.127		0.58	0.23	0.0019
Water	0.0516		0.063	0.028	0.37
Water	0.219		0.100	0.273
Water	0.119
Blood	0.95
Blood	0.52
Blood	0.73
Soil		0.32	0.0002	0.0004
Soil		0.95	0.0003	0.0007
Soil		1.0	0.0001	0.0001
Alloy		0.074
Alloy		0.12
Synthetic mixture		0.13
Synthetic mixture		0.52
Synthetic mixture		0.72
Food			0.79
Food			0.68
Urine				1.02
Urine				0.84
Tea					0.98
Wheat					0.76

Tabulated F-value for (5, 5) degrees of freedom at P(0.98) is 5.72. s₁ = standard deviation of proposed method, s₂ = standard deviation of reference method,¹⁵s₃ = standard deviation of reference method,²⁶s₄ = standard deviation of reference method,³¹s₅ = standard deviation of reference method,³³s₆ = standard deviation of reference method.²⁸