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2007 Confidence Interval Detail
110/Hockley
110-905/Ropes ISD

Category Summary

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

Stratum
Variance
A 3,077,421 0.9610 3,202,311 15 106 .028719608
A 3,053,100 0.9192 3,321,475 16 44 .011627908
A 3,113,656 0.9479 3,284,794 14 30 .023506200
A 2,932,699 0.8915 3,289,623 13 19 .003961705
D3 17,034,793 0.9002 18,923,343 20 1,078 .049633752
G1 1,427,650 0.9517 1,500,105 12 17 .145000640
L1 1,448,310 1.1090 1,305,960 20 42 .075428683
Random Totals: 32,087,629   34,827,611 110 1,336  
Catg J Exception Values: 1,311,850   1,384,561      
Catg D1 Exception Values: 21,095,655   20,544,686      
Catg G1 Exception Values: 1,664,290   1,759,562      
Total Test Values (4): 56,159,424   58,516,420      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 2,925,821

Confidence Interval Values (5)

State Lower Limit: 55,590,599 (State Test Value minus Margin of Error Percent)
Local Test Value: 56,159,424 (Within Confidence Interval)
State Upper Limit: 61,442,241 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 63,384,531 (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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