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2006 Confidence Interval Detail
225/Titus
225-906/Chapel Hill ISD

Category Summary

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

Stratum
Variance
A 11,550,169 0.8388 13,769,872 15 185 .045136526
A 11,442,614 0.9432 12,131,694 16 96 .023387853
A 11,481,501 0.9270 12,385,654 15 62 .015064406
A 11,365,615 0.9127 12,452,739 14 40 .017226203
D3 30,555,361 0.7913 38,614,130 22 31,246 .132108787
Random Totals: 76,395,260   89,354,089 82 31,629  
Catg J Exception Values: 3,243,965   3,712,239      
Catg D1 Exception Values: 3,109,077   2,632,576      
Total Test Values (4): 82,748,302   95,698,904      

Margin of Error

Margin of Error Percent: 6.5400394
Margin of Error Value: 6,258,746

Confidence Interval Values (5)

Local Test Value: 82,748,302 (Outside Confidence Interval)
State Lower Limit: 89,440,158 (State Test Value minus Margin of Error Percent)
State Upper Limit: 101,957,650 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 81,132,134 (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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