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2011 Confidence Interval Detail
220/Tarrant
220-920/White Settlement ISD

Category Summary

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

Stratum
Variance
A 209,081,225 0.9164 228,154,981 15 3,198 .044115650
A 212,983,561 0.9900 215,134,910 15 2,209 .015432381
A 202,494,884 1.0167 199,168,766 15 1,621 .004321860
A 227,239,150 0.9893 229,696,907 15 1,084 .006609420
B 15,441,326 1.0708 14,420,364 10 200 .006581456
B 13,320,374 1.0827 12,302,922 9 86 .014926825
B 18,025,162 0.8608 20,940,012 5 10 .028338115
F1 59,412,430 0.8237 72,128,724 9 116 .086538122
F1 59,411,315 0.8833 67,260,631 8 35 .002894929
F1 64,547,323 0.8843 72,992,562 6 18 .021374937
F1 60,162,305 0.8541 70,439,416 3 4 .002819878
G1 39,275,268 0.9694 40,515,028 8 39 .005796057
G1 38,524,819 0.9901 38,910,028 7 22 .000994713
G1 40,696,421 1.0202 39,890,630 6 17 .007549458
G1 35,741,913 1.0071 35,489,934 5 10 .008260110
L1 20,077,436 0.9559 21,003,699 9 123 .037172443
L1 17,368,958 1.0291 16,877,814 7 22 .000474786
L1 50,792,564 0.9514 53,387,181 8 14 .014378572
Random Totals: 1,384,596,434   1,448,714,509 160 8,828  
Catg D1 Exception Values: 477,812   251,477      
Catg B Exception Values: 41,778,000   44,144,000      
Total Test Values (4): 1,426,852,246   1,493,109,986      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 74,655,499

Confidence Interval Values (5)

State Lower Limit: 1,418,454,487 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,426,852,246 (Within Confidence Interval)
State Upper Limit: 1,567,765,485 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,537,477,404 (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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