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2006 Confidence Interval Detail
237/Waller
237-905/Royal ISD

Category Summary

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

Stratum
Variance
A 32,217,216 1.0399 30,981,071 9 625 .076548537
A 32,209,257 0.9230 34,896,270 10 344 .061671410
A 32,208,243 1.1146 28,896,683 10 237 .016684774
A 32,197,407 1.0170 31,659,201 8 138 .002983222
D3 109,831,650 1.0385 105,759,894 19 4,595 .091802728
F1 7,832,861 0.8483 9,233,598 8 117 .065068011
F1 7,787,401 0.8873 8,776,514 9 44 .032679311
F1 7,861,413 0.9636 8,158,378 5 19 .005468962
F1 7,686,736 0.7913 9,714,060 4 9 .045621820
G1 16,052,898 0.9844 16,307,292 5 17 .000049797
G1 17,792,510 0.9384 18,960,475 4 7 .021678865
G1 20,738,105 0.7420 27,948,929 3 4 .041407452
L1 4,018,016 1.3160 3,053,204 7 123 .077748728
L1 3,991,942 1.0874 3,671,089 6 45 .035657053
L1 3,986,749 0.9831 4,055,283 5 20 .006468128
Random Totals: 336,412,404   342,071,941 112 6,344  
Catg J Exception Values: 11,192,848   11,661,512      
Catg D1 Exception Values: 12,382,440   11,702,325      
Catg G1 Exception Values: 8,229,500   8,264,706      
Catg L1 Exception Values: 15,737,360   15,234,225      
Total Test Values (4): 383,954,552   388,934,670      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 19,446,734

Confidence Interval Values (5)

State Lower Limit: 369,487,936 (State Test Value minus Margin of Error Percent)
Local Test Value: 383,954,552 (Within Confidence Interval)
State Upper Limit: 408,381,404 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 529,115,319 (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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