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2008 Confidence Interval Detail
228/Trinity
228-905/Apple Springs ISD

Category Summary

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

Stratum
Variance
A 1,616,013 0.6347 2,546,105 16 93 .102807040
A 1,637,124 0.6052 2,705,096 15 57 .014274422
A 1,599,209 0.6284 2,544,890 16 37 .025494505
A 1,836,746 0.7551 2,432,454 12 23 .010591126
D3 11,651,013 1.1161 10,439,040 42 1,447 .383287031
Random Totals: 18,340,105   20,667,585 101 1,657  
Catg J Exception Values: 1,351,460   1,539,589      
Catg D1 Exception Values: 10,426,576   14,075,380      
Total Test Values (4): 30,118,141   36,282,554      

Margin of Error

Margin of Error Percent: 5.5081514
Margin of Error Value: 1,998,498

Confidence Interval Values (5)

Local Test Value: 30,118,141 (Outside Confidence Interval)
State Lower Limit: 34,284,056 (State Test Value minus Margin of Error Percent)
State Upper Limit: 38,281,052 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 27,234,038 (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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