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2008 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 13,339,285 1.0075 13,239,985 9 192 .008150885
A 15,516,468 0.9683 16,024,443 8 123 .016065537
A 14,321,064 0.9678 14,797,545 8 76 .002718998
A 17,396,959 1.0001 17,395,219 8 59 .005481506
D3 39,618,424 0.8944 44,296,091 20 1,509 .107729854
Random Totals: 100,192,200   105,753,283 53 1,959  
Catg D1 Exception Values: 3,099,551   2,593,902      
Total Test Values (4): 103,291,751   108,347,185      

Margin of Error

Margin of Error Percent: 6.2386254
Margin of Error Value: 6,759,375

Confidence Interval Values (5)

State Lower Limit: 101,587,810 (State Test Value minus Margin of Error Percent)
Local Test Value: 103,291,751 (Within Confidence Interval)
State Upper Limit: 115,106,560 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 99,154,625 (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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