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2007 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 204,553,136 1.0039 203,758,478 15 3,497 .015276127
A 204,466,410 0.9387 217,818,696 23 1,918 .007197560
A 204,415,037 0.9717 210,368,465 29 1,376 .005832810
A 204,442,412 0.9696 210,852,323 23 894 .006481349
B 36,680,952 0.9806 37,406,641 7 122 .011185292
B 39,133,549 1.0517 37,209,802 5 18 .002053769
B 68,176,258 0.9939 68,594,686 5 9 .001311634
D3 217,156,910 0.9441 230,014,734 39 7,447 .044871578
F1 49,861,773 0.9674 51,542,044 8 314 .005207095
F1 49,510,158 0.9918 49,919,498 6 90 .001648955
F1 49,932,062 0.9559 52,235,654 6 38 .004526261
F1 49,388,272 0.9584 51,532,003 4 11 .002464271
L1 27,103,538 1.1327 23,928,258 8 369 .025458748
L1 26,780,103 1.1022 24,296,954 6 70 .008083724
L1 27,255,365 0.9700 28,098,314 6 26 .060543408
L1 26,573,960 1.2549 21,176,157 4 7 .016590847
Random Totals: 1,485,429,895   1,518,752,707 194 16,206  
Catg D1 Exception Values: 35,049,336   32,476,064      
Total Test Values (4): 1,520,479,231   1,551,228,771      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 77,561,439

Confidence Interval Values (5)

State Lower Limit: 1,473,667,332 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,520,479,231 (Within Confidence Interval)
State Upper Limit: 1,628,790,210 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,516,964,605 (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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