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2007 Confidence Interval Detail
237/Waller
237-904/Waller ISD

Category Summary

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

Stratum
Variance
A 155,842,995 1.0378 150,166,694 15 2,377 .044463494
A 152,960,695 0.9883 154,771,522 14 1,480 .035592855
A 154,352,555 1.0039 153,752,919 14 1,020 .011324786
A 154,214,515 0.9928 155,332,912 18 621 .003747087
D3 470,764,606 1.0424 451,616,084 28 11,161 .067681968
F1 21,434,711 1.0850 19,755,494 7 231 .024908805
F1 21,480,729 1.0583 20,297,391 8 61 .011203921
F1 21,977,726 0.9527 23,068,884 5 25 .007460854
F1 20,029,123 1.0264 19,513,955 4 11 .000919499
Random Totals: 1,173,057,655   1,148,275,855 113 16,987  
Catg D1 Exception Values: 24,033,438   23,152,109      
Total Test Values (4): 1,197,091,093   1,171,427,964      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 58,571,398

Confidence Interval Values (5)

State Lower Limit: 1,112,856,566 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,197,091,093 (Within Confidence Interval)
State Upper Limit: 1,229,999,362 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,359,065,678 (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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