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2007 Confidence Interval Detail
015/Bexar
015-901/Alamo Heights ISD

Category Summary

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

Stratum
Variance
A 858,925,223 0.9736 882,215,718 60 3,789 .009820396
A 857,781,384 0.9814 874,038,500 51 2,019 .012177222
A 858,663,773 0.9905 866,899,317 67 1,287 .012445912
A 857,969,388 1.0093 850,063,795 37 648 .003447938
F1 219,268,639 0.9247 237,124,082 8 246 .040939567
F1 224,647,810 0.9285 241,947,022 6 39 .016578722
F1 212,448,033 1.0087 210,615,677 5 14 .045943262
L1 72,331,330 1.1318 63,908,226 7 529 .016997119
L1 73,490,523 1.1082 66,315,217 6 76 .004295164
L1 71,195,705 1.0412 68,378,510 5 14 .004833646
L1 71,552,270 1.0792 66,301,214 3 4 .024088782
Random Totals: 4,378,274,078   4,427,807,278 255 8,665  
Catg F1 Exception Values: 143,422,700   154,143,500      
Total Test Values (4): 4,521,696,778   4,581,950,778      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 229,097,539

Confidence Interval Values (5)

State Lower Limit: 4,352,853,239 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,521,696,778 (Within Confidence Interval)
State Upper Limit: 4,811,048,317 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,414,736,091 (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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