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2009 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 214,903,084 0.9848 218,220,028 36 3,523 .023390791
A 219,579,001 0.9392 233,793,655 29 2,008 .007435703
A 220,898,380 0.9567 230,896,185 33 1,450 .008226022
A 224,391,000 0.9747 230,215,451 19 939 .002154296
B 42,322,770 1.0205 41,472,582 7 133 .005434938
B 38,287,699 0.9451 40,511,797 6 14 .003728376
B 33,119,940 0.9701 34,140,748 3 5 .000268151
D3 242,835,890 0.9382 258,831,688 13 7,816 .003432029
F1 55,161,100 0.9299 59,319,389 7 335 .008789430
F1 59,389,190 0.9124 65,091,177 7 115 .027167718
F1 53,080,470 1.0230 51,887,067 8 39 .014438268
F1 62,994,070 0.9712 64,862,098 4 15 .002236434
L1 27,882,970 1.1008 25,329,733 8 388 .038415717
L1 27,697,370 1.0468 26,459,085 7 73 .008972168
L1 32,997,980 1.0808 30,531,070 5 29 .006230944
L1 113,386,950 1.0360 109,446,863 3 9 .002413448
Random Totals: 1,668,927,864   1,721,008,616 195 16,891  
Catg D1 Exception Values: 17,036,252   17,889,436      
Catg B Exception Values: 54,990,641   53,209,921      
Total Test Values (4): 1,740,954,757   1,792,107,973      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 89,605,399

Confidence Interval Values (5)

State Lower Limit: 1,702,502,574 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,740,954,757 (Within Confidence Interval)
State Upper Limit: 1,881,713,372 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,719,003,787 (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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