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2006 Confidence Interval Detail
226/Tom Green
226-907/Grape Creek ISD

Category Summary

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

Stratum
Variance
A 19,820,544 0.9297 21,319,290 7 685 .001245133
A 19,790,283 0.9330 21,211,450 8 404 .000328769
A 19,875,386 0.9459 21,012,143 7 296 .000873318
A 19,724,098 0.9463 20,843,388 8 187 .000403248
D3 9,002,439 1.0584 8,505,706 10 1,074 .004132133
Random Totals: 88,212,750   92,891,977 40 2,646  
Catg D1 Exception Values: 5,515,620   5,255,510      
Total Test Values (4): 93,728,370   98,147,487      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,907,374

Confidence Interval Values (5)

State Lower Limit: 93,240,113 (State Test Value minus Margin of Error Percent)
Local Test Value: 93,728,370 (Within Confidence Interval)
State Upper Limit: 103,054,861 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 103,986,062 (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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