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2008 Confidence Interval Detail
068/Ector
068-901/Ector County ISD

Category Summary

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

Stratum
Variance
A 524,087,985 0.9493 552,078,358 50 10,420 .037450991
A 699,135,326 0.9416 742,497,160 50 8,254 .020994209
A 870,107,961 0.9852 883,179,010 50 6,863 .009697163
A 1,117,277,177 1.0152 1,100,548,835 50 4,827 .009466584
F1 213,335,388 1.0067 211,915,554 24 2,223 .035075089
F1 239,773,664 1.0165 235,881,617 7 674 .011077992
F1 235,619,642 0.9693 243,082,268 7 172 .000952154
F1 245,256,593 0.7946 308,654,157 5 29 .119446890
G1 911,389,356 1.0756 847,331,123 9 290 .010096246
G1 947,527,222 1.0422 909,160,643 7 39 .030648372
G1 996,287,112 0.9990 997,284,396 4 7 .001697867
L1 314,674,626 1.1071 284,233,245 8 1,056 .024913956
L1 393,022,256 0.9868 398,279,546 8 255 .006692869
L1 449,821,538 1.0054 447,405,548 6 77 .000644500
L1 348,023,509 1.0538 330,255,750 5 14 .004472896
Random Totals: 8,505,339,355   8,491,787,210 290 35,200  
Catg D1 Exception Values: 4,548,755   5,147,958      
Catg G1 Exception Values: 752,999,117   739,733,701      
Total Test Values (4): 9,262,887,227   9,236,668,869      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 461,833,443

Confidence Interval Values (5)

State Lower Limit: 8,774,835,426 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,262,887,227 (Within Confidence Interval)
State Upper Limit: 9,698,502,312 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,301,998,934 (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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