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2011 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 16,182,295 0.9077 17,827,801 13 230 .022594444
A 13,133,930 0.9579 13,711,170 12 101 .013473948
A 15,143,360 0.9453 16,019,634 12 75 .027598349
A 11,336,483 1.0133 11,187,687 14 38 .004065035
D3 45,895,121 0.9050 50,712,841 15 1,606 .186591689
Random Totals: 101,691,189   109,459,133 66 2,050  
Catg D1 Exception Values: 3,098,687   2,507,718      
Total Test Values (4): 104,789,876   111,966,851      

Margin of Error

Margin of Error Percent: 10.2486896
Margin of Error Value: 11,475,135

Confidence Interval Values (5)

State Lower Limit: 100,491,716 (State Test Value minus Margin of Error Percent)
Local Test Value: 104,789,876 (Within Confidence Interval)
State Upper Limit: 123,441,986 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 102,998,945 (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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