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2007 Confidence Interval Detail
044/Collingsworth
044-902/Wellington ISD

Category Summary

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

Stratum
Variance
A 7,868,204 0.9063 8,681,677 17 491 .099237281
A 7,877,834 0.9384 8,394,964 15 205 .086786133
A 7,870,784 0.9430 8,346,537 13 131 .009647474
A 7,784,799 0.8958 8,690,332 11 80 .036529944
D3 7,327,730 0.9961 7,356,420 18 2,044 .036554394
F1 1,312,134 0.9720 1,349,932 6 84 .000292948
F1 1,297,706 0.9543 1,359,851 5 25 .001730553
F1 1,319,764 0.9211 1,432,813 4 10 .007850598
F1 1,223,771 0.8725 1,402,603 2 3 .005847257
L1 958,782 0.7956 1,205,106 6 48 .114392243
L1 1,134,102 0.9214 1,230,847 4 9 .005721320
L1 1,049,586 0.9927 1,057,304 3 4 .000171807
Random Totals: 47,025,196   50,508,386 104 3,134  
Catg J Exception Values: 1,734,050   1,793,120      
Catg D1 Exception Values: 30,812,490   39,334,067      
Catg L1 Exception Values: 1,889,540   1,902,540      
Total Test Values (4): 81,461,276   93,538,113      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 4,676,906

Confidence Interval Values (5)

Local Test Value: 81,461,276 (Outside Confidence Interval)
State Lower Limit: 88,861,207 (State Test Value minus Margin of Error Percent)
State Upper Limit: 98,215,019 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 90,968,502 (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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