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2007 Confidence Interval Detail
101/Harris
101-912/Houston ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 13,320,248,865 0.9845 13,529,963,296 66 125,075 .009382246
A 13,321,141,675 0.9881 13,481,572,386 70 61,928 .004629984
A 13,319,706,634 0.9741 13,673,859,598 84 32,253 .007143867
A 13,319,195,477 0.9843 13,531,642,260 76 12,018 .005609939
B 2,064,587,317 0.9403 2,195,668,741 111 4,662 .017716277
B 2,067,416,866 1.0598 1,950,761,338 7 365 .013689721
B 2,075,627,936 0.9111 2,278,156,005 6 124 .008936502
B 2,040,881,921 0.8900 2,293,125,754 9 54 .005628729
C 583,646,142 0.9345 624,554,459 32 20,634 .091042823
C 586,316,086 0.9167 639,594,290 33 4,340 .045049271
C 582,482,712 0.8462 688,351,113 17 1,212 .158281868
C 581,854,114 0.9176 634,104,309 7 188 .000942055
D3 331,639,418 0.6504 509,900,704 10 1,262 .361229474
F1 6,264,053,723 0.7912 7,917,155,868 28 9,414 .079678933
F1 6,268,651,552 0.8899 7,044,220,196 19 1,443 .015772465
F1 6,323,663,949 0.8785 7,198,251,507 15 309 .042011420
F1 6,190,678,856 0.9225 6,710,762,988 16 58 .022190907
L1 2,096,527,486 1.0112 2,073,306,454 9 16,516 .002297039
L1 2,099,877,032 0.9714 2,161,701,701 10 1,914 .006963136
L1 2,104,293,408 0.9945 2,115,931,029 11 446 .050560104
L1 2,094,598,224 1.0569 1,981,831,984 6 81 .015990072
Random Totals: 97,637,089,393   103,234,415,980 642 294,296  
Catg D1 Exception Values: 2,808,201   2,716,614      
Total Test Values (4): 97,639,897,594   103,237,132,594      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 5,161,856,630

Confidence Interval Values (5)

Local Test Value: 97,639,897,594 (Outside Confidence Interval)
State Lower Limit: 98,075,275,964 (State Test Value minus Margin of Error Percent)
State Upper Limit: 108,398,989,224 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 96,222,302,871 (See ISD Summary Worksheet)

Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories

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