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2009 Confidence Interval Detail
220/Tarrant
220-917/Castleberry ISD

Category Summary

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

Stratum
Variance
A 102,828,657 0.9865 104,235,841 14 1,873 .024529018
A 102,655,341 1.0181 100,830,312 26 1,416 .019701564
A 100,698,940 1.0327 97,510,352 25 1,071 .020970113
A 101,925,887 1.0786 94,498,319 18 763 .023900471
F1 17,929,596 0.9813 18,271,269 7 130 .038531045
F1 17,487,838 0.8791 19,892,888 7 57 .053226790
F1 16,612,748 0.8431 19,704,362 6 25 .006872289
F1 16,961,147 0.9409 18,026,514 4 11 .011092658
Random Totals: 477,100,154   472,969,857 107 5,346  
Catg D1 Exception Values: 8,976   8,898      
Total Test Values (4): 477,109,130   472,978,755      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 23,648,938

Confidence Interval Values (5)

State Lower Limit: 449,329,817 (State Test Value minus Margin of Error Percent)
Local Test Value: 477,109,130 (Within Confidence Interval)
State Upper Limit: 496,627,693 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 488,454,077 (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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