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2009 Confidence Interval Detail
224/Throckmorton
224-902/Woodson ISD

Category Summary

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

Stratum
Variance
A 827,450 0.9723 851,023 8 54 .029141065
A 745,910 0.9656 772,483 7 29 .017208588
A 793,110 0.8736 907,864 5 21 .109565458
A 753,070 1.0011 752,243 6 13 .011180232
D3 4,254,530 0.7816 5,443,360 20 981 .107026168
G1 3,239,331 1.0564 3,066,387 15 47 .009077872
G1 3,007,300 1.0114 2,973,403 9 14 .005050532
G1 3,432,090 1.1362 3,020,674 7 9 .032964225
G1 2,741,110 1.0401 2,635,429 4 5 .001845249
Random Totals: 19,793,901   20,422,866 81 1,173  
Catg J Exception Values: 631,611   924,375      
Catg D1 Exception Values: 3,881,780   3,257,067      
Total Test Values (4): 24,307,292   24,604,308      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,230,215

Confidence Interval Values (5)

State Lower Limit: 23,374,093 (State Test Value minus Margin of Error Percent)
Local Test Value: 24,307,292 (Within Confidence Interval)
State Upper Limit: 25,834,523 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 24,907,291 (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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