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2006 Confidence Interval Detail
226/Tom Green
226-903/San Angelo ISD

Category Summary

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

Stratum
Variance
A 487,061,489 0.9383 519,089,299 7 10,777 .001416097
A 487,225,544 0.9692 502,708,981 8 5,819 .001482088
A 486,529,291 0.9502 512,028,300 9 3,965 .003218986
A 486,857,099 0.9722 500,778,748 8 2,055 .000473948
F1 132,956,140 0.6170 215,488,071 10 1,058 1.138345908
F1 132,741,600 0.9112 145,677,788 8 291 .022053026
F1 134,597,186 0.6957 193,470,154 7 78 .476921778
F1 130,921,090 0.8546 153,195,752 8 20 .071571165
L1 73,780,698 1.0112 72,963,507 8 202 .002421987
L1 74,935,356 1.0278 72,908,500 7 62 .002364124
L1 70,718,771 1.0384 68,103,593 6 15 .000787484
Random Totals: 2,698,324,264   2,956,412,693 86 24,342  
Catg D1 Exception Values: 6,374,690   6,287,543      
Total Test Values (4): 2,704,698,954   2,962,700,236      

Margin of Error

Margin of Error Percent: 5.9903108
Margin of Error Value: 177,474,953

Confidence Interval Values (5)

Local Test Value: 2,704,698,954 (Outside Confidence Interval)
State Lower Limit: 2,785,225,283 (State Test Value minus Margin of Error Percent)
State Upper Limit: 3,140,175,189 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,034,025,764 (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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