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2010 Confidence Interval Detail
025/Brown
025-906/Zephyr ISD

Category Summary

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

Stratum
Variance
A 1,125,790 1.0232 1,100,264 11 42 .007269639
A 1,284,150 0.9417 1,363,651 8 28 .035907517
A 1,063,480 0.9900 1,074,222 8 16 .003033102
A 1,332,410 0.9696 1,374,185 7 13 .010062646
D3 18,205,780 0.9997 18,211,243 31 773 .020922765
Random Totals: 23,011,610   23,123,565 65 872  
Catg J Exception Values: 6,854,890   6,720,070      
Catg D1 Exception Values: 3,286,480   3,243,402      
Total Test Values (4): 33,152,980   33,087,037      

Margin of Error

Margin of Error Percent: 5.0000005
Margin of Error Value: 1,654,352

Confidence Interval Values (5)

State Lower Limit: 31,432,685 (State Test Value minus Margin of Error Percent)
Local Test Value: 33,152,980 (Within Confidence Interval)
State Upper Limit: 34,741,389 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 32,516,251 (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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