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2009 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 46,592,060 0.9867 47,220,087 18 834 .065843745
A 31,363,250 0.9748 32,174,036 12 320 .030200691
A 31,801,310 0.8974 35,437,163 12 225 .017258347
A 47,132,650 0.9667 48,756,233 12 189 .010801147
D3 134,061,780 0.9331 143,673,540 24 92,992 .014220140
F1 12,810,660 1.0257 12,489,675 7 125 .001773376
F1 17,424,170 0.9969 17,478,353 6 53 .018884033
F1 15,321,850 1.0323 14,842,439 7 18 .005295719
F1 25,241,520 0.8299 30,415,134 4 9 .032461431
G1 6,197,860 0.7380 8,398,184 4 11 .125061548
G1 6,305,380 0.5953 10,591,937 3 4 .432056455
L1 15,672,283 0.9903 15,825,793 7 152 .189438321
L1 16,952,275 1.1666 14,531,352 6 22 .020171883
L1 24,768,685 1.1585 21,379,961 3 10 .054134925
Random Totals: 431,645,733   453,213,887 125 94,964  
Catg J Exception Values: 16,419,870   10,518,693      
Catg D1 Exception Values: 13,569,180   13,747,532      
Catg G1 Exception Values: 31,130,535   30,846,915      
Catg L1 Exception Values: 11,122,778   11,143,073      
Total Test Values (4): 503,888,096   519,470,100      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 25,973,505

Confidence Interval Values (5)

State Lower Limit: 493,496,595 (State Test Value minus Margin of Error Percent)
Local Test Value: 503,888,096 (Within Confidence Interval)
State Upper Limit: 545,443,605 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 693,303,182 (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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