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2011 Confidence Interval Detail
228/Trinity
228-903/Trinity ISD

Category Summary

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

Stratum
Variance
A 49,320,001 0.9429 52,306,714 19 1,459 .141591753
A 51,443,218 0.8208 62,674,486 13 667 .309984073
A 47,626,775 0.9814 48,529,422 12 373 .015573555
A 49,383,351 0.9973 49,517,047 10 225 .059185389
C 9,163,259 1.1147 8,220,381 10 3,302 .076825938
C 8,908,607 1.0348 8,609,013 16 2,071 .578803674
C 9,640,111 0.6231 15,471,210 12 994 .450003119
C 7,338,779 0.9004 8,150,576 10 258 .238637923
D3 26,522,133 0.9810 27,035,813 19 1,278 .262103208
F1 4,439,558 0.5122 8,667,626 10 98 .247771693
F1 5,548,636 0.7962 6,968,897 9 44 .144802703
F1 5,460,495 0.5749 9,498,165 6 14 .020323000
F1 5,437,177 0.6583 8,259,421 4 6 .008400238
Random Totals: 280,232,100   313,908,771 150 10,789  
Catg J Exception Values: 9,659,280   9,948,008      
Catg D1 Exception Values: 6,436,975   6,084,965      
Total Test Values (4): 296,328,355   329,941,744      

Margin of Error

Margin of Error Percent: 7.3909787
Margin of Error Value: 24,385,924

Confidence Interval Values (5)

Local Test Value: 296,328,355 (Outside Confidence Interval)
State Lower Limit: 305,555,820 (State Test Value minus Margin of Error Percent)
State Upper Limit: 354,327,668 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 289,317,286 (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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