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2009 Confidence Interval Detail
240/Webb
240-903/United ISD

Category Summary

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

Stratum
Variance
A 1,070,623,629 0.9204 1,163,215,590 58 11,783 .023651496
A 1,073,493,643 0.9601 1,118,106,075 58 8,135 .005806782
A 1,043,303,911 0.9837 1,060,591,553 58 5,656 .008046313
A 1,081,599,046 0.9857 1,097,290,297 58 3,092 .024731341
C 77,554,270 1.0203 76,011,242 14 3,545 .189912514
C 83,143,987 0.8161 101,879,656 8 1,860 .040920547
C 84,352,330 1.0366 81,374,040 7 434 .026446271
C 91,936,890 1.0301 89,250,451 7 108 .011363145
D3 305,885,058 0.8692 351,915,621 12 7,780 .135203146
F1 536,463,909 0.9364 572,900,373 7 1,385 .037369109
F1 541,283,137 0.9224 586,820,400 7 464 .052098736
F1 552,203,800 0.9294 594,150,850 7 189 .008256275
F1 571,919,434 0.9494 602,400,921 6 58 .001185505
G1 247,722,344 1.0450 237,054,875 7 1,136 .002029118
G1 247,775,056 1.0398 238,291,071 7 383 .005456493
G1 248,211,183 1.0424 238,115,103 7 165 .001727992
G1 246,938,892 1.0129 243,793,950 6 69 .008182139
L1 174,690,853 0.9194 190,005,278 7 1,268 .029215957
L1 176,297,509 1.0283 171,445,599 7 244 .001227930
L1 178,303,300 0.9891 180,268,224 6 62 .002238861
L1 162,953,430 0.9690 168,166,594 5 17 .003230618
Random Totals: 8,796,655,611   9,163,047,763 359 47,833  
Catg D1 Exception Values: 72,908,614   109,502,717      
Total Test Values (4): 8,869,564,225   9,272,550,480      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 463,627,524

Confidence Interval Values (5)

State Lower Limit: 8,808,922,956 (State Test Value minus Margin of Error Percent)
Local Test Value: 8,869,564,225 (Within Confidence Interval)
State Upper Limit: 9,736,178,004 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,743,761,472 (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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