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2007 Confidence Interval Detail
246/Williamson
246-911/Taylor ISD

Category Summary

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

Stratum
Variance
A 107,004,029 0.9255 115,617,535 24 1,549 .027124869
A 106,982,928 0.9535 112,200,239 33 1,010 .019981451
A 106,856,802 0.9749 109,607,962 46 815 .008716018
A 106,940,992 0.9774 109,413,743 41 546 .013183430
D3 47,747,057 1.0279 46,451,072 14 1,475 .054950276
F1 29,118,794 1.0149 28,691,294 8 177 .060168827
F1 29,279,544 1.0172 28,784,451 6 53 .001158732
F1 89,416,551 0.9711 92,077,593 6 16 .001494357
L1 13,487,514 0.9969 13,529,455 7 220 .008429786
L1 13,984,940 1.0646 13,136,333 7 51 .012838318
L1 26,160,671 0.9852 26,553,665 6 10 .000191905
Random Totals: 676,979,822   696,063,342 198 5,922  
Catg D1 Exception Values: 9,631,486   9,994,024      
Total Test Values (4): 686,611,308   706,057,366      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 35,302,868

Confidence Interval Values (5)

State Lower Limit: 670,754,498 (State Test Value minus Margin of Error Percent)
Local Test Value: 686,611,308 (Within Confidence Interval)
State Upper Limit: 741,360,234 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 752,956,539 (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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