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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 0.9316 12,398,206 13 185 .019791632
A 11,442,614 1.0160 11,262,415 16 96 .022691889
A 11,481,501 0.9978 11,506,816 15 62 .015059843
A 11,365,615 0.9830 11,562,172 14 40 .021440314
D3 30,555,361 0.8519 35,867,310 22 31,246 .100253632
Random Totals: 76,395,260   82,596,919 80 31,629  
Catg J Exception Values: 3,243,965   3,181,502      
Catg D1 Exception Values: 3,109,077   2,628,255      
Total Test Values (4): 82,748,302   88,406,676      

Margin of Error

Margin of Error Percent: 5.7206720
Margin of Error Value: 5,057,456

Confidence Interval Values (5)

Local Test Value: 82,748,302 (Outside Confidence Interval)
State Lower Limit: 83,349,220 (State Test Value minus Margin of Error Percent)
State Upper Limit: 93,464,132 (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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