Iowa	Rhode Island
% Catholic	11%	45%
% Protestant	89%	55%
Whites SAT Math	613	533
Whites SAT Verbal	592	512
A = SAT Score Catholics
B = SAT score Protestants
Math
Iowa	0.11 * A + 0.89 * B = 613
RI	0.45 * A + 0.55 * B = 533
	A = (613 - .89B)/.11
	0.45 * (613 - .89B)/0.11 +.55B = 533
	2,507.72 - 3.641B + .55B = 533
	3.091B = 1,974.72
	B = 638.9
	A = (613 - .89 * 638.9)/.11 = 403.4
Verbal
Iowa	0.11 * A + 0.89 * B = 592
RI	0.45 * A + 0.55 * B = 512
	A = (592 - .89B)/.11
	0.45 * (592 - .89B)/0.11 +.55B = 512
	2,421.8 - 3.641B + .55B = 512
	3.091B = 1,909.8
	B = 617.9
	A = (592 - .89 * 617.9)/.11 = 382.8
	Math	Verbal	Difference
Protestants	639	618
Catholics	403	383
	236	235	471

	Catholic %	1976	1981	1986	1991	1993	1994	1995	Catholic %	Adjustment
North Dakota	16	554	544	556	571	583	559	592	22.2	-6.2
Iowa	11	568	566	576	578	583	574	583	17.1	-6.1
Minnesota	15	552	539	540	543	556	562	579	21.5	-6.5
Wisconsin	16	544	533	536	542	551	557	572	29	-13
South Dakota	19	561	561	567	551	558	548	563	20.5	-1.5
Maryland	39.5	471	461	475	475	478	479	479	16.9	22.6
Connecticut	42	471	463	474	468	474	472	477	38.7	3.3
Massachusetts	41	469	462	473	470	476	475	477	42.7	-1.7
New Jersey	41.1	454	450	465	469	473	475	478	41.1	0
Delaware	44	476	470	475	464	465	464	468	18.3	25.7
Rhode Island	45	469	452	466	459	464	462	463	59.2	-14.2
District Columbia				439	435	441	443	445		0
Montana ..............	22	539	541	518	516	523	536			22
Nebraska .............	16.5	537	549	543	544	543	556			16.5
Maine ................	43	465	466	458	463	463	469			43
Vermont ..............	42	467	474	466	467	472	472			42
Alaska ...............	36	486	479	481	477	477	489			36