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2009 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 728,464,854 0.9558 762,151,971 72 11,819 .027077171
A 857,778,823 0.9496 903,305,416 79 8,286 .013202038
A 912,300,287 0.9940 917,807,130 72 5,981 .009532971
A 948,513,954 1.0082 940,799,399 77 3,481 .011449460
F1 239,689,555 0.9208 260,305,772 19 2,250 .046129396
F1 247,604,551 0.9754 253,849,242 13 626 .001298152
F1 262,708,711 0.9913 265,014,336 11 171 .010849291
F1 258,084,060 1.0349 249,380,674 9 29 .008329325
G1 756,074,197 1.1072 682,870,481 9 302 .014314056
G1 783,920,143 1.0213 767,570,883 6 44 .007871727
G1 847,743,745 1.0213 830,063,395 4 8 .010829406
L1 375,506,699 1.0648 352,654,676 7 1,019 .024350225
L1 434,434,490 1.0349 419,784,027 9 229 .003320331
L1 438,153,617 0.9650 454,045,199 10 68 .041310317
L1 343,241,049 1.0126 338,970,027 5 15 .018748098
Random Totals: 8,434,218,735   8,398,572,628 402 34,328  
Catg D1 Exception Values: 4,509,708   5,299,675      
Catg G1 Exception Values: 614,820,390   620,560,066      
Total Test Values (4): 9,053,548,833   9,024,432,369      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 451,221,618

Confidence Interval Values (5)

State Lower Limit: 8,573,210,751 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,053,548,833 (Within Confidence Interval)
State Upper Limit: 9,475,653,987 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,384,426,273 (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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