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2008 Confidence Interval Detail
246/Williamson
246-914/Coupland ISD

Category Summary

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

Stratum
Variance
A 3,955,150 0.9498 4,164,192 9 58 .042134463
A 3,040,808 1.0106 3,008,914 6 32 .007500885
A 4,093,913 0.9695 4,222,706 8 32 .006294422
A 4,153,659 0.9484 4,379,649 6 20 .003367466
D3 24,458,991 0.9756 25,070,716 20 771 .009141036
Random Totals: 39,702,521   40,846,177 49 913  
Catg J Exception Values: 4,738,451   4,681,952      
Catg D1 Exception Values: 4,957,735   4,256,934      
Catg F1 Exception Values: 2,797,608   2,684,157      
Total Test Values (4): 52,196,315   52,469,220      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 2,623,461

Confidence Interval Values (5)

State Lower Limit: 49,845,759 (State Test Value minus Margin of Error Percent)
Local Test Value: 52,196,315 (Within Confidence Interval)
State Upper Limit: 55,092,681 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 50,315,018 (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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