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2008 Confidence Interval Detail
236/Walker
236-902/Huntsville ISD

Category Summary

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

Stratum
Variance
A 200,851,825 0.8645 232,332,938 10 3,441 .030381306
A 204,928,611 0.9558 214,405,326 16 1,945 .020628009
A 213,995,830 1.0027 213,419,597 9 1,464 .015928898
A 241,030,980 0.9560 252,124,456 13 1,050 .010322084
B 36,701,470 0.9896 37,087,177 7 176 .021754611
B 33,473,800 1.0227 32,730,811 5 18 .008200188
B 59,594,280 0.9422 63,250,138 4 11 .002133577
D3 238,391,980 0.8587 277,619,634 22 7,716 .018960876
F1 56,001,520 0.9429 59,392,852 7 350 .011178800
F1 51,748,730 0.9441 54,812,763 7 102 .004557925
F1 50,890,160 0.9544 53,321,626 6 41 .023576438
F1 61,868,660 0.9676 63,940,327 4 15 .002430108
L1 28,232,650 1.1253 25,088,998 7 363 .521879223
L1 25,880,260 0.9864 26,237,084 6 61 .031884659
L1 31,111,570 1.1921 26,098,121 7 24 .028452020
Random Totals: 1,534,702,326   1,631,861,848 130 16,777  
Catg D1 Exception Values: 35,111,512   34,596,502      
Catg B Exception Values: 26,014,650   27,049,438      
Catg L1 Exception Values: 58,233,760   56,574,274      
Total Test Values (4): 1,654,062,248   1,750,082,062      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 87,504,103

Confidence Interval Values (5)

Local Test Value: 1,654,062,248 (Outside Confidence Interval)
State Lower Limit: 1,662,577,959 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,837,586,165 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,652,920,248 (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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