Changes in breaststroke swimming performances in national and international athletes competing between 1994 and 2011 –a comparison with freestyle swimming performances

Table 4 Comparison of linear and non-linear regression analysis of changes in swimming speed for female and male freestyle swimmers at international level across years to determine which model is the best

	Kind of regression	Sum of Squares	DOF	AICC	Best regression AIC-Test	Best regression F-Test	Delta	Probability	Likelihood
50 m freestyle	polynomial	0.00061	2	−35.82	linear	linear	23.53	7.76 e^-06	99.99%
male FINA finalists	linear	0.00340	6	−59.35	linear	linear	23.53	7.76 e^-06	99.99%
100 m freestyle	polynomial	0.00017	2	−45.86	linear	linear	32.22	1.005 e⁻⁰⁷	100%
male FINA finalists	linear	0.00130	6	−66.92	linear	linear	32.22	1.005 e⁻⁰⁷	100%
200 m freestyle	polynomial	0.00020	2	−44.73	linear	linear	23.55	7.69 e^-06	99.99%
male FINA finalists	linear	0.00110	6	−68.28	linear	linear	23.55	7.69 e^-06	99.99%
50 m freestyle	polynomial	0.00039	2	−39.26	linear	linear	18.46	9.76 e^-05	99.99%
female FINA finalists	linear	0.00420	6	−57.73	linear	linear	18.46	9.76 e^-05	99.99%
100 m freestyle	polynomial	0.00019	2	−44.78	linear	linear	22.05	1.62 e^-05	99.99%
female FINA finalists	linear	0.00130	6	−66.84	linear	linear	22.05	1.62 e^-05	99.99%
200 m freestyle	polynomial	1.58 e^-05	2	−65.03	linear	polynomial	1.24	0.34	65.08%
female FINA finalists	linear	0.00140	6	−66.27	linear	polynomial	1.24	0.34	65.08%

ISSN: 2052-1847