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2008 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 33,101,919 0.6059 54,632,644 39 1,495 .174336751
A 37,686,438 0.6459 58,347,171 29 776 .178136514
A 36,120,046 0.7173 50,355,564 19 416 .111995355
A 44,131,592 0.6734 65,535,480 17 271 .286710995
C 9,559,263 0.6058 15,779,569 20 3,447 2.181117490
C 8,852,293 1.0137 8,732,656 15 2,081 .129466261
C 10,460,025 0.5694 18,370,258 15 1,067 .307553204
C 7,587,242 0.6827 11,113,581 16 275 .461133962
D3 20,072,259 0.7949 25,251,301 25 1,648 .194186042
F1 4,613,715 0.9297 4,962,585 10 120 .083618911
F1 4,588,146 0.9141 5,019,304 9 41 .023467618
F1 4,964,226 0.7600 6,531,876 6 16 .112042771
F1 4,157,967 0.8262 5,032,640 5 6 .041289668
Random Totals: 225,895,131   329,664,629 225 11,659  
Catg J Exception Values: 8,299,438   8,793,047      
Catg D1 Exception Values: 7,477,786   10,325,317      
Total Test Values (4): 241,672,355   348,782,993      

Margin of Error

Margin of Error Percent: 7.0803100
Margin of Error Value: 24,694,917

Confidence Interval Values (5)

Local Test Value: 241,672,355 (Outside Confidence Interval)
State Lower Limit: 324,088,076 (State Test Value minus Margin of Error Percent)
State Upper Limit: 373,477,910 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 221,128,001 (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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