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2007 Confidence Interval Detail
213/Somervell
213-901/Glen Rose ISD

Category Summary

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

Stratum
Variance
A 47,840,404 0.8590 55,693,136 13 641 .056844060
A 47,861,527 0.9510 50,327,578 16 341 .024722214
A 47,793,594 1.0065 47,484,942 17 221 .016899348
A 47,693,110 0.9694 49,198,587 15 141 .004165185
D3 146,154,139 0.9399 155,499,669 27 2,791 .117241828
F1 11,435,653 0.8765 13,046,952 12 117 .041831744
F1 11,731,009 0.8836 13,276,380 12 39 .092389014
F1 11,849,587 0.8480 13,973,570 10 15 .049697519
F1 10,548,240 0.8639 12,210,024 4 5 .078017199
L1 5,700,974 1.0268 5,552,176 9 173 .031730117
L1 16,996,028 0.9111 18,654,405 5 36 .046418066
Random Totals: 405,604,265   434,917,419 140 4,520  
Catg J Exception Values: 34,518,312   34,729,549      
Catg D1 Exception Values: 6,678,671   5,944,189      
Total Test Values (4): 446,801,248   475,591,157      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 23,779,558

Confidence Interval Values (5)

Local Test Value: 446,801,248 (Outside Confidence Interval)
State Lower Limit: 451,811,599 (State Test Value minus Margin of Error Percent)
State Upper Limit: 499,370,715 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,797,170,195 (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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