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2007 Confidence Interval Detail
043/Collin
043-903/Celina ISD

Category Summary

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

Stratum
Variance
A 74,209,335 0.9985 74,320,816 23 614 .004046798
A 73,867,168 1.0142 72,832,940 25 406 .005497212
A 74,071,522 0.9872 75,031,931 23 268 .000614275
A 73,928,789 1.0014 73,825,433 22 159 .000665051
D3 184,212,988 0.9638 191,131,965 21 3,022 .061146623
Random Totals: 480,289,802   487,143,085 114 4,469  
Catg D1 Exception Values: 6,669,452   6,183,276      
Total Test Values (4): 486,959,254   493,326,361      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 24,666,318

Confidence Interval Values (5)

State Lower Limit: 468,660,043 (State Test Value minus Margin of Error Percent)
Local Test Value: 486,959,254 (Within Confidence Interval)
State Upper Limit: 517,992,679 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 574,113,307 (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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