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2008 Confidence Interval Detail
091/Grayson
091-909/Whitesboro ISD

Category Summary

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

Stratum
Variance
A 43,838,542 0.6711 65,323,412 10 1,177 .200181389
A 39,756,123 0.9613 41,356,624 11 579 .080565981
A 51,094,956 1.0290 49,654,962 9 496 .005329852
A 62,108,319 0.9551 65,028,080 8 367 .016734268
D3 106,593,007 0.9996 106,635,661 27 2,941 .010700941
F1 8,768,644 0.8081 10,850,939 8 100 .106540464
F1 8,583,855 0.8272 10,377,001 5 33 .111448892
F1 9,508,196 0.9279 10,247,005 6 18 .121513081
F1 8,465,450 0.7792 10,864,284 4 8 .087577791
G1 7,334,940 0.9712 7,552,451 6 43 .012524036
G1 6,951,070 0.9852 7,055,491 5 13 .007221857
G1 8,657,349 1.0241 8,453,617 3 6 .014337009
Random Totals: 361,660,451   393,399,527 102 5,781  
Catg D1 Exception Values: 6,688,413   4,427,811      
Catg G1 Exception Values: 5,436,970   5,737,719      
Total Test Values (4): 373,785,834   403,565,057      

Margin of Error

Margin of Error Percent: 5.3438219
Margin of Error Value: 21,565,798

Confidence Interval Values (5)

Local Test Value: 373,785,834 (Outside Confidence Interval)
State Lower Limit: 381,999,259 (State Test Value minus Margin of Error Percent)
State Upper Limit: 425,130,855 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 370,875,702 (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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