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2007 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 37,094,336 1.3435 27,610,224 15 668 .070776444
A 37,136,385 1.0195 36,426,077 26 366 .021964501
A 37,168,998 1.0223 36,358,210 27 256 .023219965
A 36,895,677 1.0457 35,283,233 15 148 .009731527
D3 120,416,167 0.8828 136,402,545 27 4,647 .205885675
F1 11,025,857 0.9546 11,550,238 7 121 .027226336
F1 11,077,444 1.0819 10,238,880 6 45 .040158614
F1 10,958,853 0.9363 11,704,425 5 19 .004164202
F1 10,648,253 0.9576 11,119,730 8 9 .004069235
G1 11,872,040 0.8306 14,293,330 7 17 .082484583
G1 12,387,290 0.9023 13,728,571 4 6 .073709280
G1 14,952,560 1.1300 13,232,354 3 4 .049487281
L1 7,850,795 1.1129 7,054,358 7 162 .110523698
L1 7,949,087 1.0298 7,719,059 6 45 .008176715
L1 15,511,563 1.1198 13,852,083 5 13 .005668799
Random Totals: 382,945,305   386,573,317 168 6,526  
Catg J Exception Values: 6,980,046   6,543,377      
Catg D1 Exception Values: 12,471,595   12,329,507      
Catg G1 Exception Values: 29,507,228   30,143,760      
Total Test Values (4): 431,904,174   435,589,961      

Margin of Error

Margin of Error Percent: 5.5619996
Margin of Error Value: 24,227,512

Confidence Interval Values (5)

State Lower Limit: 411,362,449 (State Test Value minus Margin of Error Percent)
Local Test Value: 431,904,174 (Within Confidence Interval)
State Upper Limit: 459,817,473 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 598,941,190 (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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