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2009 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 97,913,720 0.9227 106,116,528 15 1,573 .018677769
A 96,278,500 0.9958 96,684,575 17 916 .032527363
A 102,436,500 0.9928 103,179,392 16 685 .033749268
A 106,668,370 1.0474 101,841,102 15 433 .025688773
C 13,349,890 0.9737 13,710,476 9 2,404 .065035576
C 15,377,080 0.8428 18,245,230 12 835 .057261461
C 14,090,490 0.9488 14,850,854 7 370 .079789869
C 15,514,130 1.0745 14,438,464 8 201 .083688483
D3 347,990,280 0.9474 367,310,830 35 8,258 .017205187
Random Totals: 809,618,960   836,377,451 134 15,675  
Catg D1 Exception Values: 17,614,710   16,130,272      
Total Test Values (4): 827,233,670   852,507,723      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 42,625,386

Confidence Interval Values (5)

State Lower Limit: 809,882,337 (State Test Value minus Margin of Error Percent)
Local Test Value: 827,233,670 (Within Confidence Interval)
State Upper Limit: 895,133,109 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 978,502,475 (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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