Competitive landscape

Parity & Concentration

Transparent descriptive measures of repeat winners and title concentration. Athletic and activity categories are identified explicitly and are never compared as though they were the same competition format.

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Parity and championship concentration by category, sport or activity, and decade

Athletic	Girls Outdoor Track	2010s	70	28	60.0%	32.9%	0.047	0.953
Activity	Quiz Bowl	2010s	70	32	54.3%	32.9%	0.043	0.957
Athletic	Baseball	2010s	69	44	36.2%	27.5%	0.032	0.968
Athletic	Girls Basketball	2010s	69	44	36.2%	24.6%	0.030	0.970
Athletic	Cheer	2010s	69	26	62.3%	39.1%	0.056	0.944
Athletic	Boys Golf	2010s	69	28	59.4%	40.6%	0.057	0.943
Athletic	Softball (Fast Pitch)	2010s	69	39	43.5%	26.1%	0.034	0.966
Athletic	Boys Outdoor Track	2010s	69	30	56.5%	39.1%	0.050	0.950
Athletic	Boys Basketball	2010s	68	38	44.1%	29.4%	0.036	0.964
Athletic	Girls Golf	2010s	68	32	52.9%	32.4%	0.044	0.956
Athletic	Football	2010s	60	31	48.3%	36.7%	0.047	0.953
Athletic	Girls Tennis	2010s	60	23	61.7%	51.7%	0.076	0.924
Athletic	Boys Tennis	2010s	59	20	66.1%	61.0%	0.092	0.908
Athletic	Girls Outdoor Track	2000s	58	29	50.0%	39.7%	0.051	0.949
Athletic	Girls Cross Country	2010s	58	24	58.6%	44.8%	0.061	0.939
Athletic	Boys Outdoor Track	2000s	57	29	49.1%	31.6%	0.044	0.956
Athletic	Boys Cross Country	2010s	57	21	63.2%	43.9%	0.063	0.937
Athletic	Baseball	2000s	56	37	33.9%	32.1%	0.038	0.962
Athletic	Boys Basketball	2000s	56	43	23.2%	19.6%	0.027	0.973
Athletic	Girls Basketball	2000s	56	35	37.5%	32.1%	0.038	0.962
Athletic	Boys Tennis	2000s	56	20	64.3%	62.5%	0.102	0.898
Activity	Quiz Bowl	2000s	56	31	44.6%	33.9%	0.045	0.955
Athletic	Football	1970s	55	35	36.4%	27.3%	0.037	0.963
Athletic	Girls Tennis	2000s	55	26	52.7%	41.8%	0.060	0.940
Athletic	Girls Outdoor Track	1980s	55	31	43.6%	36.4%	0.046	0.954