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2007 Confidence Interval Detail
084/Galveston
084-908/Hitchcock ISD

Category Summary

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

Stratum
Variance
A 80,411,657 1.0586 75,960,379 10 1,332 .014947822
A 80,518,714 1.0238 78,646,917 11 654 .018496083
A 80,449,690 0.9713 82,826,820 9 247 .002434077
A 80,204,059 1.0358 77,431,994 8 136 .008858145
C 17,518,963 0.9683 18,092,495 9 1,113 .022960970
C 17,804,292 0.8418 21,150,264 7 156 .014792834
C 17,188,616 0.9102 18,884,439 8 100 .002000777
C 17,438,116 1.0320 16,897,399 6 61 .024607984
F1 10,499,379 0.9347 11,232,886 8 83 .014562481
F1 10,628,530 0.9384 11,326,225 5 25 .023302729
F1 12,249,457 0.9397 13,035,497 5 7 .065469864
L1 5,161,545 1.1088 4,655,073 6 83 .049201368
L1 4,946,092 1.0233 4,833,472 5 16 .001717262
L1 6,658,251 0.9593 6,940,739 3 5 .016664495
Random Totals: 441,677,361   441,914,599 100 4,018  
Catg D1 Exception Values: 1,661,111   1,960,729      
Catg F1 Exception Values: 7,794,280   8,093,398      
Catg L1 Exception Values: 3,448,590   3,501,973      
Total Test Values (4): 454,581,342   455,470,699      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 22,773,535

Confidence Interval Values (5)

State Lower Limit: 432,697,164 (State Test Value minus Margin of Error Percent)
Local Test Value: 454,581,342 (Within Confidence Interval)
State Upper Limit: 478,244,234 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 487,548,512 (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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