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NAEP Analysis and Scaling → Estimation of Population and Student Group Distributions → Examining the Population-Structure Models Used in NAEP → Proportion of Variance of the Group-Defining Contrasts Accounted for by the Principal Components Used in NAEP Student Group Distribution Models → Proportion of Variance of the Group-Defining Contrasts Accounted for by the Principal Components Used in the Population-Structure Model, Grade 8 Geography National Main Assessment (Accommodations Not Permitted): 2001

NAEP Technical DocumentationProportion of variance of the group-defining contrasts accounted for by the principal components used in the population-structure model, grade 8 geography national main assessment (accommodations not permitted [R2]): 2001

Group-defining contrast	Proportion of Variance
FEMALE	0.92
BLACK	0.96
HISPANIC	0.96
ASIAN	0.95
MEXICAN	0.94
PUER RIC	0.98
CUBN,OTH	0.97
HISP-?	0.97
MID CTY7	0.92
FR/LCTY7	0.94
FR/MCTY7	0.93
LAR TWN7	0.94
SML TWN7	0.94
OTHER	0.94
HS GRAD	0.95
POST HS	0.94
COL GRAD	0.96
PARED-?	0.96
S EAST	0.90
CENTRAL	0.90
WEST	0.91
PRIVATE	0.95
CATHOLIC	0.91
MODAGE	0.99
ABOVE	0.99
BLACK	0.89
HISPANIC	0.82
ASIAN	0.83
IEP-NO	0.96
LEP-NO	0.88
TITLE-N	0.85
RED PRIC	0.93
FREE	0.78
INFO N/A	0.87
SCH/REF	0.90
SCH/NP	0.89
TVLIN-0	0.98
TV-QUAD	0.98
O.RELIG	0.92
COURSE1	0.94
COURSE2	0.93
COURSE3	0.96
COURMISS	0.94
G/R 22	0.90
G/R 23	0.90
G/R 24	0.94
G/T 22	0.67
G/T 23	0.76
G/T 24	0.70
G/T 25	0.95
G/T 26	0.70
G/T 27	0.71
G/P 22	0.95
G/P 23	0.96
G/P 24	0.81
G/P 25	0.93
G/S 22	0.95
G/S 23	0.94
R/T 24	0.90
R/T 25	0.91
R/T 26	0.91
R/T 27	0.93
R/T 31	0.91
R/T 32	0.91
R/T 33	0.91
R/T 34	0.90
R/T 35	0.91
R/T 36	0.97
R/T 37	0.93
R/T 41	0.90
R/T 42	0.91
R/T 43	0.93
R/T 44	0.92
R/T 45	0.93
R/T 46	0.93
R/T 47	0.94
R/P 24	0.89
R/P 25	0.90
R/P 31	0.91
R/P 32	0.86
R/P 33	0.90
R/P 34	0.90
R/P 35	0.91
R/P 41	0.88
R/P 42	0.96
R/P 43	0.95
R/P 44	0.94
R/P 45	0.93
R/S 31	0.97
R/S 32	0.96
R/S 33	0.96
R/S 41	0.95
R/S 42	0.96
R/S 43	0.97
P/T 25	0.75
P/T 26	0.78
P/T 27	0.71
P/T 31	0.96
P/T 32	0.75
P/T 33	0.73
P/T 34	0.74
P/T 35	0.79
P/T 36	0.72
P/T 37	0.95
P/T 41	0.75
P/T 42	0.73
P/T 43	0.81
P/T 44	0.78
P/T 45	0.79
P/T 46	0.96
P/T 47	0.78
P/T 51	0.78
P/T 52	0.79
P/T 53	0.80
P/T 54	0.77
P/T 55	0.98
P/T 56	0.79
P/T 57	0.78
T/S 41	0.94
T/S 42	0.93
T/S 43	0.95
T/S 51	0.95
T/S 52	0.95
T/S 53	0.95
T/S 61	0.95
T/S 62	0.96
T/S 63	0.94
T/S 71	0.95
T/S 72	0.94
T/S 73	0.95
P/S 32	0.93
P/S 33	0.92
P/S 41	0.93
P/S 42	0.91
P/S 43	0.92
P/S 51	0.92
P/S 52	0.94
P/S 53	0.95
G/C 22	0.79
G/C 23	0.73
G/C 24	0.77
G/C 25	0.77
R/C 24	0.88
R/C 25	0.86
R/C 31	0.87
R/C 32	0.86
R/C 33	0.87
R/C 34	0.86
R/C 35	0.88
R/C 41	0.85
R/C 42	0.93
R/C 43	0.92
R/C 44	0.92
R/C 45	0.92
P/C 25	0.79
P/C 31	0.78
P/C 32	0.76
P/C 33	0.79
P/C 34	0.79
P/C 35	0.78
P/C 41	0.75
P/C 42	0.80
P/C 43	0.76
P/C 44	0.78
P/C 45	0.73
P/C 51	0.81
P/C 52	0.81
P/C 53	0.82
P/C 54	0.81
P/C 55	0.80
C/T 25	0.84
C/T 26	0.82
C/T 27	0.83
C/T 31	0.96
C/T 32	0.85
C/T 33	0.84
C/T 34	0.84
C/T 35	0.81
C/T 36	0.85
C/T 37	0.96
C/T 41	0.86
C/T 42	0.85
C/T 43	0.80
C/T 44	0.78
C/T 45	0.80
C/T 46	0.96
C/T 47	0.82
C/T 51	0.82
C/T 52	0.87
C/T 53	0.85
C/T 54	0.88
C/T 55	0.97
C/T 56	0.87
C/T 57	0.87
S/C 23	0.93
S/C 24	0.93
S/C 25	0.92
S/C 31	0.92
S/C 32	0.93
S/C 33	0.92
S/C 34	0.91
S/C 35	0.92
SAMP S3	0.85
S/R 22	0.90
S/R 23	0.90
S/R 24	0.95
ARPT NO	0.98
B008201B	0.93
B008201C	0.93
B008201D	0.94
B008201E	0.97
B008201F	0.96
B008201G	0.97
B008201M	0.71
B017001B	0.85
B017001I	0.85
B017001M	0.90
B000905N	0.93
B000905I	0.94
B000905M	0.86
B013801B	0.97
B013801C	0.96
B013801D	0.95
B013801M	0.88
B017101B	0.75
B017101M	0.91
B017201B	0.81
B017201I	0.94
B017201M	0.90
B017301B	0.78
B017301I	0.94
B017301M	0.87
B017401B	0.93
B017401C	0.93
B017401D	0.94
B017401E	0.92
B017401M	0.91
B017601B	0.96
B017601C	0.97
B017601D	0.96
B017601M	0.89
B017701B	0.92
B017701C	0.92
B017701M	0.88
B017801B	0.93
B017801C	0.89
B017801D	0.92
B017801E	0.87
B017801M	0.83
B017901B	0.89
B017901C	0.88
B017901D	0.86
B017901M	0.88
B018001B	0.90
B018001C	0.93
B018001D	0.94
B018001E	0.88
B018001M	0.83
B018101B	0.86
B018101C	0.87
B018101D	0.93
B018101E	0.96
B018101M	0.84
B003501B	0.86
B003501C	0.88
B003501D	0.90
B003501I	0.83
B003501M	0.90
B003601B	0.90
B003601C	0.89
B003601D	0.88
B003601I	0.79
B003601M	0.90
B018201B	0.94
B018201C	0.91
B018201D	0.81
B018201M	0.80
B020501B	0.94
B020501C	0.95
B020501D	0.95
B020501M	0.82
B020502B	0.94
B020502C	0.94
B020502D	0.94
B020502M	0.67
B020503B	0.89
B020503C	0.90
B020503D	0.91
B020503M	0.67
B020504B	0.89
B020504C	0.88
B020504D	0.90
B020504M	0.70
B020505B	0.93
B020505C	0.93
B020505D	0.93
B020505M	0.78
B020506B	0.96
B020506C	0.96
B020506D	0.95
B020506M	0.72
B020507B	0.95
B020507C	0.96
B020507D	0.94
B020507M	0.79
B020508B	0.92
B020508C	0.94
B020508D	0.91
B020508M	0.78
B020509B	0.94
B020509C	0.93
B020509D	0.87
B020509M	0.81
B020601B	0.88
B020601C	0.92
B020601D	0.94
B020601E	0.81
B020601M	0.81
B020602B	0.89
B020602C	0.87
B020602D	0.87
B020602E	0.83
B020602M	0.83
B020603B	0.90
B020603C	0.87
B020603D	0.89
B020603E	0.83
B020603M	0.84
B020701B	0.96
B020701C	0.98
B020701D	0.98
B020701E	0.98
B020701M	0.83
B020801B	0.92
B020801C	0.91
B020801D	0.91
B020801M	0.88
B020802B	0.88
B020802C	0.88
B020802D	0.90
B020802M	0.88
B020803B	0.91
B020803C	0.89
B020803D	0.89
B020803M	0.89
B020804B	0.90
B020804C	0.89
B020804D	0.91
B020804M	0.83
B020805B	0.92
B020805C	0.94
B020805D	0.91
B020805M	0.86
B020806B	0.90
B020806C	0.88
B020806D	0.89
B020806M	0.86
B020807B	0.90
B020807C	0.88
B020807D	0.88
B020807M	0.89
G801601N	0.84
G801601I	0.86
G801601M	0.95
G801602N	0.76
G801602I	0.83
G801602M	0.94
G801603N	0.74
G801603I	0.78
G801501B	0.93
G801501C	0.95
G801501D	0.94
G801501M	0.90
G801505B	0.94
G801505C	0.95
G801505D	0.94
G801505M	0.87
G801507B	0.91
G801507C	0.89
G801507D	0.88
G801507M	0.92
G801510B	0.95
G801510C	0.95
G801510D	0.93
G801510M	0.90
B019001B	0.90
B019001C	0.85
B019001D	0.90
B019001E	0.80
B019001M	0.80
B019101B	0.91
B019101C	0.89
B019101D	0.95
B019101E	0.72
B019101M	0.79
B019201B	0.89
B019201C	0.94
B019201D	0.95
B019201E	0.94
B019201M	0.86
B019301B	0.88
B019301C	0.88
B019301D	0.96
B019301E	0.96
B019301M	0.73
G801401B	0.84
G801401C	0.81
G801401M	0.75
C046201M	0.88
C046202M	0.97
C046203M	0.98
C046204M	0.98
C046206M	0.98
C046207M	0.95
C046208M	0.92
C046209M	0.91
C046210M	0.94
C046211M	0.93
C046212M	0.96
C046213M	0.95
C046301B	0.93
C046301I	0.92
C046301M	0.95
C046302B	0.89
C046302I	0.89
C046302M	0.94
C046303B	0.88
C046303I	0.89
C046303M	0.91
C046304B	0.89
C046304I	0.90
C046304M	0.94
C038101A	0.90
C038101M	0.91
C046501B	0.89
C046501C	0.90
C046501D	0.93
C046501E	0.90
C046501F	0.89
C046501G	0.87
C046501M	0.94
C038301N	0.90
C038301M	0.95
C043801B	0.91
C043801C	0.89
C043801D	0.91
C043801E	0.93
C043801F	0.92
C043801G	0.90
C043801H	0.89
C043801M	0.91
C046610B	0.94
C046610M	0.96
C046701B	0.91
C046701C	0.89
C046701D	0.88
C046701E	0.90
C046701F	0.90
C046701G	0.91
C046701H	0.92
C046701M	0.93
C044004B	0.89
C044004C	0.91
C044004D	0.90
C044004E	0.93
C044004F	0.87
C044004M	0.91
C046702B	0.90
C046702C	0.90
C046702D	0.91
C046702E	0.90
C046702G	0.91
C046702H	0.86
C046702M	0.94
C046703B	0.90
C046703C	0.91
C046703D	0.92
C046703E	0.90
C046703F	0.90
C046703H	0.92
C046703M	0.95
C044007B	0.89
C044007C	0.92
C044007D	0.95
C044007E	0.88
C044007F	0.92
C044007M	0.94
C047401A	0.90
C047401M	0.89
C047501B	0.92
C047501C	0.90
C047501D	0.91
C047501E	0.91
C047501F	0.92
C047501G	0.90
C047501H	0.90
C047501M	0.95
C047601B	0.92
C047601M	0.92
C047701B	0.88
C047701M	0.94
C047702B	0.89
C047702M	0.93
C047801B	0.90
C047801C	0.90
C047801D	0.92
C047801E	0.93
C047801F	0.94
C047801M	0.90
C047802B	0.89
C047802C	0.89
C047802D	0.89
C047802E	0.87
C047802F	0.88
C047802M	0.93
C047803B	0.91
C047803C	0.90
C047803D	0.90
C047803E	0.89
C047803F	0.89
C047803M	0.94
C047901B	0.91
C047901C	0.91
C047901D	0.91
C047901E	0.91
C047901F	0.89
C047901M	0.93
C047902B	0.90
C047902C	0.92
C047902D	0.90
C047902E	0.92
C047902F	0.92
C047902M	0.92
C047903B	0.89
C047903C	0.89
C047903D	0.89
C047903E	0.90
C047903F	0.90
C047903M	0.94
C048101B	0.93
C048101I	0.89
C048101M	0.96
C048201B	0.89
C048201I	0.89
C048201M	0.98
C048202B	0.89
C048202I	0.91
C048202M	0.99
C048203B	0.86
C048203I	0.91
C048203M	0.99
C048204B	0.91
C048204I	0.89
C048204M	0.99
C048205B	0.92
C048205I	0.90
C048205M	0.99
C048206B	0.88
C048206I	0.89
C048207B	0.91
C048207I	0.90
C048207M	0.99
C048301B	0.91
C048301C	0.92
C048301D	0.93
C048301M	0.97
C048302B	0.91
C048302C	0.91
C048302D	0.90
C048302M	0.98
C048303B	0.90
C048303C	0.89
C048303D	0.89
C048303M	0.95
C048304B	0.91
C048304C	0.92
C048304D	0.89
C048304M	0.96
C048305B	0.90
C048305C	0.90
C048305D	0.90
C048305M	0.97
C048401B	0.90
C048401M	0.99
C048402B	0.88
C048402M	0.93
C048403B	0.90
C048403M	0.97
C048404B	0.86
C048404M	0.98
C048405B	0.87
C048405M	0.98
C048406B	0.88
C048406M	0.97
C048407B	0.89
C048407M	0.96
C048408B	0.89
C048409B	0.89
C048410B	0.86
C048501B	0.90
C048501M	0.95
C048502B	0.89
C048502M	0.96
C048503B	0.90
C048503M	0.96
C048504B	0.88
C048504M	0.96
C048505B	0.91
C048505M	0.96
C048601B	0.92
C048601M	0.98
C048602B	0.91
C048603B	0.88
C048603M	0.98
C048701B	0.89
C048702B	0.88
C048702M	0.96
C048703B	0.89
C048703M	0.98
C048704B	0.88
C048704M	0.95
C046901M	0.89
C046902M	0.89
C046903M	0.91
C046904M	0.90
C046905M	0.91
C046906M	0.90
C046907M	0.91
C046908M	0.89
C046909M	0.87
C046910M	0.92
C046911M	0.92
C046912M	0.90
C046913M	0.89
C046914M	0.89
C046915M	0.91
T077101A	0.92
T077101M	0.96
T077201B	0.88
T077201C	0.87
T077201D	0.87
T077201E	0.91
T077201F	0.90
T077201M	0.93
T077301B	0.88
T077301N	0.86
T077301M	0.91
T077302B	0.91
T077302N	0.93
T077302M	0.93
T077303B	0.88
T077303N	0.87
T077303M	0.89
T077304B	0.89
T077304N	0.90
T077304M	0.92
T077401B	0.88
T077401N	0.90
T077401M	0.91
T077402B	0.89
T077402N	0.96
T077402M	0.96
T077403B	0.87
T077403N	0.92
T077403M	0.93
T077404B	0.87
T077404N	0.93
T077404M	0.93
T077501N	0.85
T077501M	0.95
T077502N	0.84
T077502M	0.98
T077503N	0.86
T077503M	0.96
T077504N	0.84
T077504M	0.92
T077505N	0.84
T077505M	0.97
T077506N	0.85
T077506M	0.96
T077507N	0.82
T077507M	0.97
T077508N	0.86
T077508M	0.95
T077509N	0.85
T077509M	0.97
T077510N	0.86
T077510M	0.98
T077601N	0.86
T077601M	0.97
T077701B	0.91
T077701C	0.89
T077701D	0.88
T077701E	0.90
T077701M	0.96
T077801N	0.91
T077801M	0.95
T077802N	0.91
T077802M	0.95
T077803N	0.90
T077803M	0.95
T077901B	0.88
T077901C	0.89
T077901D	0.86
T077901E	0.89
T077901M	0.95
T077902B	0.90
T077902C	0.89
T077902D	0.86
T077902E	0.91
T077902M	0.94
T077903B	0.88
T077903C	0.88
T077903D	0.86
T077903E	0.88
T077903M	0.95
T077904B	0.88
T077904C	0.87
T077904D	0.88
T077904E	0.87
T077904M	0.94
T078001N	0.88
T078001M	0.95
T078101B	0.89
T078101C	0.89
T078101D	0.91
T078101M	0.98
T078102B	0.90
T078102C	0.87
T078102D	0.89
T078102M	0.98
T078103B	0.89
T078103C	0.90
T078103D	0.89
T078103M	0.98
T078201B	0.89
T078201C	0.92
T078201D	0.90
T078201M	0.98
T078301B	0.90
T078301C	0.93
T078301D	0.89
T078301E	0.88
T078401A	0.91
T078401M	0.98
T078501A	0.90
T078501M	0.95
T078601A	0.89
T078601M	0.97
T078701B	0.87
T078701C	0.85
T078701D	0.89
T078701M	0.97
T078702B	0.90
T078702C	0.91
T078702D	0.88
T078702M	0.98
T078703B	0.87
T078703C	0.87
T078703D	0.88
T078703M	0.98
T078801B	0.89
T078801C	0.91
T078801D	0.86
T078801E	0.97
T078801M	0.97
T078802B	0.88
T078802C	0.90
T078802D	0.87
T078802E	0.97
T078803B	0.88
T078803C	0.90
T078803D	0.89
T078803E	0.98
T078803M	0.97
T078804B	0.88
T078804C	0.92
T078804D	0.90
T078804E	0.97
T078804M	0.96
T078805B	0.90
T078805C	0.90
T078805D	0.87
T078805E	0.94
T078805M	0.96
T082101M	0.90
T082102M	0.90
T082103M	0.87
T082201M	0.89
T082202M	0.91
T082203M	0.85
T082301M	0.88
T082302M	0.91
T082303M	0.90
T082401M	0.89
T082402M	0.91
T082403M	0.87
T082501M	0.88
T082502M	0.91
T082503M	0.91
T082601M	0.88
T082602M	0.91
T082603M	0.92
T082701M	0.89
T082702M	0.91
T082703M	0.92
T082801M	0.88
T082802M	0.92
T082803M	0.92
T082901M	0.86
T082902M	0.91
T082903M	0.93
T079001B	0.90
T079001C	0.90
T079001D	0.89
T079001E	0.88
T079001F	0.87
T079001G	0.89
T079001M	0.95
T079101B	0.90
T079101C	0.90
T079101D	0.90
T079101I	0.87
T079101M	0.97
T079102B	0.88
T079102C	0.91
T079102D	0.92
T079102I	0.87
T079102M	0.97
T079103B	0.89
T079103C	0.88
T079103D	0.91
T079103I	0.89
T079103M	0.97
T079104B	0.89
T079104C	0.89
T079104D	0.92
T079104I	0.89
T079104M	0.96
T081601B	0.86
T081601C	0.82
T081601D	0.90
T081601M	0.98
T081602B	0.91
T081602C	0.93
T081602D	0.88
T081602M	0.98
T081603B	0.89
T081603C	0.93
T081603D	0.90
T081603M	0.98
T081604B	0.87
T081604C	0.95
T081604D	0.93
T081604M	0.97
T081701B	0.90
T081701C	0.90
T081701D	0.89
T081701M	0.99
T081702B	0.90
T081703C	0.94
T081704D	0.93
T081702M	0.98
T081703B	0.88
T081703C	0.91
T081703D	0.89
T081703M	0.98
T081704B	0.88
T081704C	0.93
T081704D	0.93
T081704M	0.98
T081801B	0.87
T081801C	0.86
T081801D	0.88
T081801E	0.88
T081801M	0.99
T080201B	0.88
T080201C	0.87
T080201D	0.87
T080201M	0.96
T080202B	0.89
T080202C	0.88
T080202D	0.88
T080202M	0.96
T080203B	0.89
T080203C	0.92
T080203D	0.92
T080203M	0.97
T080204B	0.87
T080204C	0.88
T080204D	0.87
T080204M	0.96
T080301B	0.91
T080301C	0.93
T080301D	0.87
T080301M	0.95
T080302B	0.89
T080302C	0.90
T080302D	0.88
T080302M	0.96
T080303B	0.89
T080303C	0.89
T080303D	0.88
T080303M	0.96
TCHMTCHB	0.94
TCHMTCHC	0.98
T080401A	0.92
T080401M	0.96
T081501B	0.87
T081501C	0.89
T081501D	0.88
T081501M	0.97
T081502B	0.86
T081502C	0.89
T081502D	0.89
T081502M	0.98
T081503B	0.86
T081503C	0.89
T081503D	0.87
T081503M	0.95
T080701A	0.83
T080701M	0.95
T080702A	0.87
T080702M	0.91
T080703A	0.91
T080703M	0.91
T080501B	0.88
T080501C	0.87
T080501M	0.96
T080601B	0.86
T080601C	0.88
T080601M	0.96
T080801B	0.88
T080801C	0.87
T080801M	0.96
T080901B	0.92
T080901C	0.93
T080901D	0.94
T080901M	0.95
T081001B	0.86
T081001C	0.86
T081001D	0.90
T081001E	0.93
T081001F	0.93
T081001M	0.98
T081101B	0.91
T081101C	0.92
T081101D	0.88
T081101E	0.88
T081101F	0.90
T081101M	0.97
T081201B	0.89
T081201C	0.92
T081201D	0.94
T081201E	0.88
T081201M	0.97
T081301B	0.86
T081301C	0.84
T081301D	0.89
T081301M	0.96
T081302B	0.92
T081302C	0.94
T081302D	0.89
T081302M	0.98
T081401B	0.87
T081401C	0.89
T081401D	0.87
T081401M	0.98
T081402B	0.89
T081402C	0.89
T081402D	0.87
T081402M	0.98
T081403B	0.84
T081403C	0.86
T081403D	0.85
T081403M	0.98
T081404B	0.89
T081404C	0.92
T081404D	0.90
T081404M	0.98
T081405B	0.85
T081405C	0.87
T081405D	0.87
T081405M	0.97
T081406B	0.85
T081406C	0.87
T081406D	0.89
T081406M	0.98
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001 Geography Assessment.

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