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NAEP Weighting Procedures → Weighting Procedures and Variance Estimation for the 2001 National Main Assessment → Computation of School Weights → Replicate Weights and Variance Estimation → Replicate Variance Estimates at the Student Level → Grade 12 Replicate Variance Estimates

NAEP Technical DocumentationGrade 12 Replicate Variance Estimates

These totals include all students whether assessed, absent, or excluded, and whatever their assessment (geography or U.S. history). Total is slightly different from totals because of presence of records with missing gender.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the student base weights, grade 12 national main assessment: By region, 2001

Region	Total	Standard error of total	Percent	Standard error of percent
Total	2,825,665	79,285	100.00	†
Northeast	631,285	40,090	22.34	1.29
South	589,957	24,245	20.88	0.90
Midwest	746,417	40,695	26.42	1.14
West	858,007	46,997	30.36	1.28
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the student base weights, by school type, grade 12 national main assessment: 2001

School type	Estimate	Standard error	Percentage	Standard error of percent
Total	2,825,665	79,285	100.00	†
Catholic	117,536	16,845	4.16	0.59
Non-religious private	32,140	9,267	1.14	0.32
Religious non-Catholic	56,606	9,928	2.00	0.36
Public	2,619,382	78,324	92.70	0.74
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the student base weights, grade 12 national main assessment, by race: 2001

Race/ethnicity	Estimate	Standard error	Percentage	Standard error of percent
Total	2,825,665	79,285	100.00	†
White non-Hispanic	1,963,219	78,843	69.48	1.72
Black	378,189	22,159	13.38	0.84
Hispanic	303,147	36,043	10.73	1.23
Asian/Pacific Islander	151,723	30,502	5.37	1.07
American Indian	18,384	7,245	0.65	0.26
Other	11,004	3,585	0.39	0.13
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the student base weights, grade 12 national main assessment, by gender: 2001

Gender	Estimate	Standard error	Percentage	Standard error of percent
Total	2,822,100	79,511	100.00	†
Male	1,388,273	43,070	49.19	0.50
Female	1,433,828	41,312	50.81	0.50
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

The tables above show the same replicate variance estimates, but using the nonresponse-adjusted and trimmed student weights prew_ij. The differences between this set of tables and the next set reflect the effects of dropping the absent students, the nonresponse adjustments to the remaining students, and the effects of the trimming step.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the pre-poststratification student base weights, grade 12 national main assessment: By region, 2001

Region	Total	Standard error of total	Percent	Standard error of percent
Total	2,816,341	78,500	100.00	†
Northeast	632,609	40,116	22.46	1.28
South	586,093	23,736	20.81	0.89
Midwest	744,840	41,025	26.45	1.15
West	852,799	45,335	30.28	1.24
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the pre-poststratification student base weights, by school type, grade 12 national main assessment: 2001

School type	Estimate	Standard error	Percentage	Standard error of percent
Total	2,816,341	78,500	100.00	†
Catholic	117,536	16,845	4.17	0.59
Non-religious private	32,140	9,267	1.14	0.33
Religious non-Catholic	56,606	9,928	2.01	0.36
Public	2,610,058	77,218	92.68	0.74
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the pre-poststratification student base weights, grade 12 national main assessment, by race: 2001

Race/ethnicity	Estimate	Standard error	Percentage	Standard error of percent
Total	2,816,314	78,500	100.00	†
White non-Hispanic	1,949,336	78,075	69.22	1.75
Black	380,119	23,327	13.50	0.86
Hispanic	297,040	35,828	10.55	1.22
Asian/Pacific Islander	158,469	32,215	5.63	1.13
American Indian	20,273	8,202	0.72	0.29
Other	11,105	3,498	0.39	0.13
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the pre-poststratification student base weights, grade 12 national main assessment, by gender: 2001

Gender	Estimate	Standard error	Percentage	Standard error of percent
Total	2,815,397	78,537	100.00	†
Male	1,391,149	43,673	49.41	0.56
Female	1,424,249	40,815	50.59	0.56
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

The tables replicate variance estimates for the same population student subgroup totals using the final student weights, for fourth, eighth, and twelfth grades, respectively. Only reporting population 2 (R2) and U.S. history assessment weights are presented for brevity's sake.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the final student base weights, grade 12 U.S. history national main assessment (accommodations not permitted [R2]): By region, 2001

Region	Total	Standard error0 of total	Percent	Standard error0 of percent
Total	3,258,800	33,058	100.00	†
Northeast	680,139	29,971	20.87	0.97
South	719,068	39,467	22.07	1.23
Midwest	851,306	21,219	26.12	0.61
West	1,008,287	54,165	30.94	1.51
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the final student base weights, by school type, grade 12 U.S. history national main assessment (accommodations not permitted [R2]): 2001

School type	Estimate	Standard error	Percentage	Standard error of percent
Total	3,258,800	33,058	100.00	†
Catholic	131,480	19,467	4.03	0.59
Non-religious private	38,614	10,413	1.18	0.32
Religious non-Catholic	67,306	12,510	2.07	0.38
Public	3,021,401	36,430	92.72	0.74
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the final student base weights, grade 12 U.S. history national main assessment (accommodations not permitted [R2]), by race: 2001

Race/ethnicity	Estimate	Standard error	Percentage	Standard error of percent
Total	3,258,800	33,058	100.00	†
White non-Hispanic	2,337,031	27,845	71.71	0.58
Black	446,976	9,479	13.72	0.25
Hispanic	310,752	16,701	9.54	0.48
Asian/Pacific Islander	136,217	6,519	4.18	0.21
American Indian	18,278	7,441	0.56	0.23
Other	9,546	2,372	0.29	0.07
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

Estimates and replicate variance estimates of population student subgroup totals aggregated from the final student base weights, grade 12 U.S. history national main assessment (accommodations not permitted [R2]), by gender: 2001

Gender	Estimate	Standard error	Percentage	Standard error of percent
Total	3,258,139	33,056	100.00	†
Male	1,627,61	24,949	49.94	0.63
Female	1,630,878	27,485	50.06	0.63
† Not applicable. NOTE: Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.

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