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2008 Confidence Interval Detail
113/Houston
113-902/Grapeland ISD

Category Summary

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

Stratum
Variance
A 16,134,140 0.9747 16,552,929 7 412 .007763091
A 15,930,150 0.9910 16,074,823 8 230 .011235595
A 15,434,410 1.0992 14,041,494 7 155 .006332340
A 18,029,960 0.9780 18,435,542 10 94 .010094052
D3 69,427,910 1.0340 67,144,981 20 4,191 .016745414
G1 11,633,610 1.0674 10,899,016 6 13 .033543838
G1 9,504,551 1.0511 9,042,480 3 5 .002783563
G1 12,497,849 1.2651 9,878,942 3 4 .186507372
Random Totals: 168,592,580   162,070,207 64 5,104  
Catg J Exception Values: 7,686,187   7,715,084      
Catg D1 Exception Values: 15,003,340   16,296,853      
Catg G1 Exception Values: 18,948,690   17,288,917      
Total Test Values (4): 210,230,797   203,371,061      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 10,168,553

Confidence Interval Values (5)

State Lower Limit: 193,202,508 (State Test Value minus Margin of Error Percent)
Local Test Value: 210,230,797 (Within Confidence Interval)
State Upper Limit: 213,539,614 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 271,501,554 (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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