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2011 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 219,503,061 1.0199 215,220,179 12 3,517 .006165292
A 218,387,750 0.9970 219,044,885 18 1,944 .009331994
A 240,539,962 1.0307 233,375,339 26 1,555 .002405095
A 273,348,650 1.0225 267,333,643 11 1,106 .003349336
B 49,807,670 0.9659 51,566,073 11 140 .003315381
B 65,024,200 0.9704 67,007,626 8 17 .000210126
D3 269,987,134 0.7338 367,930,136 19 7,796 .594037844
F1 59,716,970 0.9669 61,761,268 10 347 .003899426
F1 58,979,100 1.0332 57,083,914 9 110 .005287137
F1 66,284,800 1.0226 64,819,871 8 45 .015452919
F1 53,864,990 0.8971 60,043,462 5 10 .002087427
L1 25,114,860 1.0072 24,935,326 10 276 .001120684
L1 26,630,900 1.0114 26,330,730 10 62 .000788821
L1 25,887,620 1.0028 25,815,337 8 21 .000520968
L1 16,222,770 1.0426 15,559,918 3 3 .002075971
Random Totals: 1,669,300,437   1,757,827,707 168 16,949  
Catg D1 Exception Values: 33,828,242   31,362,824      
Catg B Exception Values: 92,012,360   93,834,328      
Total Test Values (4): 1,795,141,039   1,883,024,859      

Margin of Error

Margin of Error Percent: 6.8326484
Margin of Error Value: 128,660,467

Confidence Interval Values (5)

State Lower Limit: 1,754,364,392 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,795,141,039 (Within Confidence Interval)
State Upper Limit: 2,011,685,326 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,899,265,243 (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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