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2010 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 877,975,839 0.9171 957,339,264 48 13,326 .036198285
A 865,150,685 0.9753 887,061,094 49 7,795 .015942229
A 857,282,191 1.0163 843,532,609 50 5,317 .010870880
A 794,541,608 1.0150 782,799,614 51 2,774 .004375859
F1 252,107,534 1.0059 250,628,824 15 2,200 .039982402
F1 260,081,094 0.9797 265,470,138 10 592 .005104041
F1 279,663,834 0.9326 299,875,439 11 162 .126009906
F1 206,066,781 0.8640 238,503,219 8 22 .098767053
G1 908,650,641 1.0535 862,506,541 13 302 .020687753
G1 918,545,752 1.0232 897,718,679 8 50 .005420315
G1 914,840,499 1.0506 870,779,078 5 10 .007092009
G1 890,573,883 0.9758 912,660,261 2 3 .000413633
L1 408,567,735 1.0337 395,247,881 10 1,039 .006025956
L1 337,237,002 1.0450 322,714,834 10 174 .008844593
L1 358,405,217 1.0956 327,131,450 9 63 .095387047
L1 271,779,951 0.9086 299,119,471 7 15 .022436407
Random Totals: 9,401,470,246   9,413,088,396 306 33,844  
Catg J Exception Values: 118,266,455   122,261,834      
Catg D1 Exception Values: 4,538,345   4,927,579      
Total Test Values (4): 9,524,275,046   9,540,277,809      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 477,013,890

Confidence Interval Values (5)

State Lower Limit: 9,063,263,919 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,524,275,046 (Within Confidence Interval)
State Upper Limit: 10,017,291,699 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,988,366,477 (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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