Veteran's Day

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2008 Confidence Interval Detail
170/Montgomery
170-904/Willis ISD

Category Summary

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

Stratum
Variance
A 332,473,775 0.9780 339,952,735 19 4,353 .015465910
A 340,710,460 0.9740 349,805,400 16 2,511 .001788055
A 389,671,675 0.9492 410,526,417 17 1,844 .005590683
A 404,581,221 1.0089 401,012,212 17 898 .007198450
C 28,285,170 0.7328 38,598,758 10 3,417 .144091091
C 26,007,246 0.7299 35,631,245 7 845 .157356377
C 31,563,270 1.0014 31,519,143 7 384 .017588906
C 43,360,950 0.8320 52,116,526 9 147 .257777322
D3 83,746,610 0.9844 85,073,761 10 1,615 .007255339
F1 32,670,790 0.9809 33,306,953 7 220 .007979336
F1 34,650,728 0.9372 36,972,608 6 79 .003776063
F1 33,919,897 0.9699 34,972,571 6 28 .011226565
F1 36,036,492 0.9437 38,186,386 4 9 .001950738
Random Totals: 1,817,678,284   1,887,674,715 135 16,350  
Catg D1 Exception Values: 28,658,731   27,797,101      
Total Test Values (4): 1,846,337,015   1,915,471,816      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 95,773,591

Confidence Interval Values (5)

State Lower Limit: 1,819,698,225 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,846,337,015 (Within Confidence Interval)
State Upper Limit: 2,011,245,407 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,853,672,020 (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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