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2008 Confidence Interval Detail
061/Denton
061-911/Northwest ISD

Category Summary

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

Stratum
Variance
A 325,116,408 1.0068 322,920,548 54 2,595 .001155317
A 362,116,049 1.0030 361,032,950 46 2,116 .001254208
A 350,879,389 0.9943 352,890,867 64 1,498 .001430670
A 442,469,195 1.0047 440,399,318 55 962 .000627809
D3 139,390,170 0.8748 159,339,472 11 2,596 .002358935
F1 167,458,538 0.9968 167,996,126 9 237 .014318117
F1 94,970,192 0.9441 100,593,361 7 15 .003812246
F1 135,333,011 1.0142 133,438,189 5 10 .004334246
F1 184,367,522 0.9835 187,460,622 4 8 .002696385
G1 240,149,446 0.9659 248,627,649 10 338 .005699574
G1 239,700,725 0.9627 248,987,977 7 157 .007554718
G1 239,986,334 1.0093 237,775,026 6 87 .003092454
G1 236,488,768 0.9926 238,251,832 6 48 .010976977
L1 55,122,833 0.9642 57,169,501 7 98 .005090964
L1 95,717,010 1.0944 87,460,718 5 18 .006102168
L1 46,619,003 0.9605 48,536,182 3 2 .002188890
Random Totals: 3,355,884,593   3,392,880,338 299 10,785  
Catg D1 Exception Values: 6,065,821   5,295,242      
Catg L1 Exception Values: 252,593,532   242,463,014      
Total Test Values (4): 3,614,543,946   3,640,638,594      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 182,031,930

Confidence Interval Values (5)

State Lower Limit: 3,458,606,664 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,614,543,946 (Within Confidence Interval)
State Upper Limit: 3,822,670,524 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,314,189,845 (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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