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2009 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 248,075,690 0.9697 255,827,256 29 3,335 .007742502
A 206,072,414 0.9707 212,292,587 25 2,040 .005068507
A 207,289,423 1.0054 206,176,072 24 1,614 .004278848
A 225,298,620 1.0301 218,715,290 22 1,069 .010312879
B 20,360,500 0.9739 20,906,151 7 216 .015115061
B 18,201,070 0.8474 21,478,723 6 63 .031765638
B 16,431,136 0.8924 18,412,299 4 6 .005929031
F1 64,880,305 0.8960 72,411,055 8 118 .017532074
F1 71,663,379 0.9331 76,801,392 6 39 .002762882
F1 47,151,775 0.9582 49,208,699 5 13 .018206448
F1 79,053,435 0.8984 87,993,583 4 6 .003547914
L1 23,455,924 1.1687 20,070,098 7 118 .069944068
L1 28,979,363 1.1076 26,164,105 5 23 .021647532
L1 20,921,811 1.0052 20,813,580 4 7 .000101362
Random Totals: 1,277,834,845   1,307,270,890 156 8,667  
Catg D1 Exception Values: 419,893   320,381      
Catg B Exception Values: 37,219,535   36,551,000      
Catg L1 Exception Values: 25,368,790   21,771,844      
Total Test Values (4): 1,340,843,063   1,365,914,115      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 68,295,706

Confidence Interval Values (5)

State Lower Limit: 1,297,618,409 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,340,843,063 (Within Confidence Interval)
State Upper Limit: 1,434,209,821 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,541,859,479 (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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