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2011 Confidence Interval Detail
226/Tom Green
226-905/Water Valley ISD

Category Summary

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

Stratum
Variance
A 8,606,250 0.8758 9,826,730 10 230 .044458382
A 8,871,900 0.8988 9,870,828 10 124 .004083132
A 8,661,700 0.9756 8,878,331 10 76 .014279616
A 9,640,000 0.9582 10,060,530 10 51 .014180446
D3 11,021,975 0.9819 11,225,150 15 1,176 .004127204
G1 9,585,826 1.0299 9,307,531 8 46 .026347887
G1 9,370,347 1.0290 9,106,265 6 14 .007729773
G1 9,158,798 1.0009 9,150,562 4 7 .011907914
G1 9,002,060 1.0073 8,936,821 3 4 .001082361
Random Totals: 83,918,856   86,362,748 76 1,728  
Catg J Exception Values: 3,070,956   3,231,056      
Catg D1 Exception Values: 10,162,340   8,725,473      
Total Test Values (4): 97,152,152   98,319,277      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 4,915,964

Confidence Interval Values (5)

State Lower Limit: 93,403,313 (State Test Value minus Margin of Error Percent)
Local Test Value: 97,152,152 (Within Confidence Interval)
State Upper Limit: 103,235,241 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 105,093,064 (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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