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2007 Confidence Interval Detail
043/Collin
043-904/Farmersville ISD

Category Summary

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

Stratum
Variance
A 35,856,187 0.9592 37,381,346 19 615 .013292685
A 35,772,190 0.9369 38,181,439 11 403 .045654026
A 35,840,868 0.9776 36,662,099 17 289 .002756181
A 35,743,852 0.9721 36,769,727 11 185 .009051524
D3 94,085,757 0.8684 108,343,801 31 2,689 .305912830
Random Totals: 237,298,854   257,338,412 89 4,181  
Catg J Exception Values: 12,426,629   13,485,376      
Catg D1 Exception Values: 3,998,375   3,620,586      
Total Test Values (4): 253,723,858   274,444,374      

Margin of Error

Margin of Error Percent: 8.0080734
Margin of Error Value: 21,977,707

Confidence Interval Values (5)

State Lower Limit: 252,466,667 (State Test Value minus Margin of Error Percent)
Local Test Value: 253,723,858 (Within Confidence Interval)
State Upper Limit: 296,422,081 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 300,660,670 (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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