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2009 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 109,955,850 0.9347 117,637,584 13 1,539 .028599114
A 129,395,417 0.9613 134,604,616 23 1,239 .009610435
A 109,259,775 0.9323 117,193,795 24 824 .021430678
A 96,581,669 0.9670 99,877,631 11 481 .010508408
D3 49,403,519 0.9314 53,042,215 11 1,525 .033179805
F1 39,250,634 1.0312 38,063,066 7 201 .003402342
F1 41,219,287 1.0741 38,375,651 6 55 .004585685
F1 51,399,439 0.9193 55,911,497 4 11 .000925121
L1 13,553,412 0.9000 15,059,347 8 210 .115301581
L1 11,725,503 1.0035 11,684,607 6 33 .003249262
L1 13,541,866 1.0006 13,533,746 4 8 .001670312
Random Totals: 665,286,371   694,983,755 117 6,126  
Catg D1 Exception Values: 12,816,566   9,817,837      
Catg F1 Exception Values: 17,511,559   17,911,578      
Catg L1 Exception Values: 5,724,771   5,855,624      
Total Test Values (4): 701,339,267   728,568,794      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 36,428,440

Confidence Interval Values (5)

State Lower Limit: 692,140,354 (State Test Value minus Margin of Error Percent)
Local Test Value: 701,339,267 (Within Confidence Interval)
State Upper Limit: 764,997,234 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 773,721,525 (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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