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2006 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 518,746,371 0.9649 537,616,718 54 12,933 .052352181
A 518,583,075 0.9570 541,884,091 59 7,331 .026892057
A 518,610,928 0.9907 523,479,285 55 4,900 .012268444
A 517,929,045 0.9938 521,160,238 54 2,636 .005712909
F1 179,199,537 0.9723 184,304,779 12 2,065 .011799492
F1 179,809,446 1.0210 176,111,113 9 534 .008989762
F1 179,610,334 1.0011 179,412,980 11 116 .014252786
F1 152,207,389 0.9755 156,030,127 9 12 .003486992
G1 615,450,662 1.0073 610,990,432 7 309 .034074061
G1 610,406,958 1.1740 519,937,784 6 32 .060882528
G1 687,379,762 0.9961 690,071,039 4 8 .014303809
L1 254,465,906 1.0165 250,335,372 12 1,091 .007435731
L1 253,789,066 0.9795 259,100,629 12 227 .039438194
L1 257,132,653 0.9198 279,552,786 11 60 .061795203
L1 248,349,359 1.0314 240,788,597 9 14 .004615015
Random Totals: 5,691,670,491   5,670,775,970 324 32,268  
Catg D1 Exception Values: 4,186,573   6,010,597      
Catg G1 Exception Values: 537,953,755   560,022,519      
Total Test Values (4): 6,233,810,819   6,236,809,086      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 311,840,454

Confidence Interval Values (5)

State Lower Limit: 5,924,968,632 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,233,810,819 (Within Confidence Interval)
State Upper Limit: 6,548,649,540 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,820,852,129 (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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