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2011 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 1,171,372,402 1.1385 1,028,873,432 22 13,384 .052651049
A 973,933,639 0.9946 979,221,435 22 7,417 .026205234
A 1,124,169,291 1.0335 1,087,730,325 25 6,097 .022938238
A 1,071,928,696 1.1123 963,704,662 22 3,061 .064181599
C 73,377,377 1.0402 70,541,604 18 3,290 .066495043
C 83,140,807 0.5090 163,341,468 21 1,627 .515761071
C 83,107,507 1.0118 82,138,275 21 385 .049908954
C 80,965,883 1.0758 75,261,092 10 95 .118424784
D3 271,412,289 0.4001 678,361,132 16 7,792 .199914394
F1 559,102,470 1.0192 548,569,927 35 1,436 .207132796
F1 569,633,400 0.9069 628,110,486 16 476 .096629099
F1 522,041,965 0.9104 573,420,436 9 178 .035605475
F1 524,697,079 0.9634 544,630,557 8 53 .011732290
G1 451,497,534 0.9762 462,505,157 10 1,009 .038020233
G1 452,767,256 0.9946 455,225,474 9 113 .012756376
G1 451,662,060 1.0002 451,571,746 6 42 .007215173
G1 448,179,727 0.9928 451,430,023 7 22 .006622217
L1 160,534,440 0.9393 170,908,592 10 1,367 .030618364
L1 145,302,270 0.9889 146,933,229 10 260 .004984473
L1 195,432,280 1.0212 191,375,127 9 97 .006381749
L1 144,665,080 0.9328 155,086,921 7 20 .011436189
Random Totals: 9,558,923,452   9,908,941,100 313 48,221  
Catg D1 Exception Values: 74,814,693   162,035,317      
Total Test Values (4): 9,633,738,145   10,070,976,417      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 503,548,821

Confidence Interval Values (5)

State Lower Limit: 9,567,427,596 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,633,738,145 (Within Confidence Interval)
State Upper Limit: 10,574,525,238 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 10,657,666,774 (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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